My machine just locked up and I cannot move it. Where is lubrication points on this machine

These machines have many lubrication points. Any place where metal to metal rubs together creates friction, and should be lubricated. But when these machines lock up, most of the time it's the feed cam that has seized. This is located on the left side where the stitch length assembly is. There is usually a large black straight slot screw right in the middle of the cam. Sometimes a plastic cap with a red arrow on it is glued to it. That just peals off. You pretty much have to replace these two pieces because what happens is that the pot alluminum swells up and then no longer turns freely in the ring any longer. A few things have to be adjusted when this is taken apart. Might be a shop job.