The good news is that disconnecting the motors is easy. On each side of the bunk is an electrical connector probably covered with electrical tape. Remove the tape and disconnect the connector. If you had one motor fail, you could disconnect just the failed motor and you would only have to lift one side of the bunk.
The black/white wire is 12 volt to the cab light. The black cable is power to the bunk bed motor on the driver's side.
The bad new is this:
I was quite surprised to see how chewed up the track is after two months of use.
Here is a view of the motor from the top with the cover removed:
The motor is buried in the corner support. It looks like changing it would be labor intensive.
Here's a picture of the pulley at the bottom of the track. The wire runs down to the pulley and then back up to the motor.
Finally, a picture of the three screws secures the lift track cover:
The third screw is behind the spiral wire warp. You just see the head of the screw.
Bruce