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I'm pretty sure the drive motor you're looking for is the one mounted under the front right side of the seat. I can see mine when looking from the front, connector is accessible (motor too) by removing the plastic trim.
Also, here are a couple other views so you can see where the bolts are is you want to continue down that path.
Here is a shot of the backside of that plastic trim on the side.
You could do the above post to manually adjust the seat for the time being. But I am almost sure the switch that moves your seats got water in it and no longer works. It is a delicate switch which stopped working for me after I was detailing with degreaser around that area.
If the switch isn't sending power you can try an aerosol can of electrical contact cleaner, and just spray it as far into the switch as you can, I've had great luck with it in the past but be warned it is some HARSH SMELLING STUFF! You definitely need a well ventilated area.