I just want to say that if you are thinking about Happijac Electric Motor Kit to upgrade from manuals, the installation, at least on our pre-wired TC is quite simple. Some instructions suggest it may be necessary to take the jacks off for the motor install. This is because a washer is dropped into the motorized section which needs to be turned to place on the jack. Because there is some grease in the motor section the washer, at least for us, just stays put even though you turn the motor.
As far as the electric goes, because our TC had well labeled wires for connecting from the jacks to the remote receiver that was simple. I started this post as there was doubt about the Power and Ground to the receiver. Panther Products sent a diagram. The power goes to a circuit breaker and there is a wire from battery to circuit breaker. The ground from receiver is grounded on the battery and that’s it.
So far from a quick test of the jacks I’d say don’t leave home without the motor driven jacks!