The center drive bushing is powered for the center rail from below.
Note the wire, top of picture, taped-down with duct tape, soldered to the center thrust bushing.
The T-bar assembly rest on the bushing. Note the wires that take power to the center rail. Both wires connect to the center rail.
The Pit rail wheels pick the outside rail common power from the pit rail. Note the connected wire that attaches to the outside rail on the TT bridge. Black wire bottom of picture, one from each bridge truck assembly.
Both electrical connections are a moveable. The TT can turn 360 degree with no concern about twisting wires.
