I had my car jump started last night. The positive was put in the right place but the negative was connected directly to the battery and not the negative post. Now my check engine light is on.

When Connecting jump leads ALWAYS Positive first, (Red), Negative last, (Black).
When Removing jump leads ALWAYS Negative first, (Black) and Positive last, (Red).
ALWAYS make sure you DON'T touch the negative to the positive at any time! (Loads of sparks and you risk damaging the battery).
Safest way I have found is this.
With the engine on BOTH vehicles turned OFF. Connect up to the flat battery first, then connect to the good battery. ONLY start the vehicle with the good battery. Wait 2 or 3 minutes to let some charge cross to the dead battery then start the vehicle with the dead battery.
The dead battery will need to be fully charged as soon as possible.

With jumper cables + to + and - to -

to jump start a car the following procedure applies
place the positive lead from the jump battery onto the positive terminal of the car battery (clip on)
place the negative lead of the jump battery onto the engine ( clip on) not the car battery terminal
this prevents power surges through the ECM
remove the jump battery is the reverse procedure
to reset an ECM use a scan tool
there are jumper leads now on the market which have surge protection in a lead so in that case positive to positive and negative to negative

The underhood connections can work by themselves...POS to POS, and NEG to NEG...sometimes dirty/weak connections do not allow the power to transfer fully from the underhood connections...if this is the case then you need to connect directly to the battery in trunk for full power charge...again POS to POS, and NEG to NEG...hope this helps

To jump start a car there is a set procedure that has to be followed to prevent ECM damage from power surge. Connect the positive lead form the jumping battery directly to the positive terminal of the dead battery. Next connect the negative lead from the jumping battery to the engine (Any place that is metal--head stud--lifting bracket-etc) to charge the battery remove the terminals and connect the charger as directed. However I would suggest that you have a load test done on the battery to check for a dead cell or jumping will achieve nothing

sounds like you are on the right track. Hook the jumper cables up to the dead car first. The red cable should go to the jumper terminal as you mentioned and a good place to hook up the black cable is the bolts on the strut tower.

then with the other car running hook up the red lead to the cars positive battery cable and then the negative to a good ground. Let the two cars sit for about 5 to ten minutes to give the dead battery a chance to charge.

Once the dead car is started let it idle with the lights turned off for at least 45 minute to an hour or drive it for the same amount of time with the light on (I assume you will be driving in the dark) or if its day time drive it for 30 to 40 minutes with the lights off. This should be enough time for the alternator to charge the dead battery.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

The battery should be on the right hand side of the car, in the engine compartment, remember when you jump start it to hook up the jumper cables like this; negative jumper cable to negative battery terminal on your car, then positive jumper cable to positive terminal on your car, then, put the other positive jumper cable to the car that's jumper car and last connect the other negative jumper cable to the jumer cars engine block, and that should help you.

First make sure the last cable is the ground cable,when you place it you should see a very small spark just before you let go for the connection to be complete.IF the attempted jump fails you probably need a new battery,the old one just doesn't have it any more.

it should have one its only covered with plastic cover on it and the proper way to jump it is positive to positive then negative to source and just connect to a good ground the other vehicle..