You have a wire connector coming up from floor and plugs into wire connector from motor to move seat.
What has happened maybe one of the wires in a connector has come loose from plug.
You may have some slack in cable through floor to help give you enough wire to stop from happening again once you reconnect wire for motor.
You say seat is binding which is why that cable is frayed the seat is only to be turned 1/2 the way around before everything will pull apart going beyond 1/2 way.
The frayed cable is probably the release cable for turning the seat
Newmar search ---
seat motor for seat does not run.