it’s not hard to take the door panel off, just a few screws, then get a flat bar to pop off the mounting tabs. start at the bottom, work towards the top. the top just hangs over a lip.
once that’s off, apply power +12V and a ground to the two motor leads. if that doesn’t work, reverse them. If that doesn’t work, you will need to wind it up manually.
at any rate, once it’s up, disconnect the motor.