How do I connect a resistance motor on a schwinn 220 exercise bike?

You will have to remove the plastic housing by unscrewing several screws about the perimeter. Take your time with the housing and inserts as they can be awkward to maneuver. There are 2 circular plastic inserts for the pedals. These can be popped out of the housing with a bit of effort to allow the housing to be cleared of the motor area without having to remove the pedals. Be careful not to break the plastic tabs on the inserts otherwise you will have to tape or glue them back in place. It will be most helpful to take several detail photos of the existing motor set up in case a screw, bolt, nut, spring, etc., pops loose making it difficult to determine from where it came. When I replaced my motor, the factory rep. recommended for easier installation that I first unplug the existing motor and plug in the replacement motor, then set the resistance to high on the control panel. Once the replacement motor has adjusted to the high setting, unplug the power, unbolt the existing motor and then install the replacement motor. Check the photos taken to ensure the motor's base is in the same alignment as the original motor. Plug the power back in and use the control panel the adjust the resistance to ensure the motor is responding. Then replace the plastic housing and again carefully pedal inserts.