The window regulator motor is too large to be removed from the rear doors without a few more steps. This is because there are rails on each side of the window glass that the window rides in as it moves up and down. This outside rail blocks the removal of the regulator.
Remove the lower 10mm bolt that holds this window rail in place. Consider taking pictures or marking on the door the exact position of this lower bolt as it has some adjustment room and the best bet is most likely to return it to where it was before removal.
Straight up from this bolt, near the very top of the door, is a second 10mm bolt that holds the top of the rail. Loosen but do not remove this bolt.