Seems like the manual says that the cuts are to be opposite of the lock-on....
".... follow these steps: 1. Attach any piece of FasTrack to one of the 5" track pack pieces. 2. Attach the other end of the 5" piece to the 10" straight lockon. Make sure that the break in the outside rail is opposite of the lock-on. 3. Attach the last 5" track pack piece to the other end of the 10" track section. Make sure that this 5" piece also has the break in the outside rail opposite of the lock-on. 4. Attach any piece of FasTrack to the other end of the 5" track piece. Red wire (Power) White wire (Trigger/ Insulated Rail) OUTSIDE RAIL CENTER RAIL LOCK-ON Black wire (Ground) Underside of Track Do NOT forcefully connect your accessory's 3-pin male connector into the 3-pin female connector on the lock-on. Doing so will damage the pins on the accessory and/or the lock-on. Make sure that you are also inserting the connectors with the proper orientation ....."
Looks like page 3 of the bridge manual also shows the cuts opposite the lock-on .....
https://www.lionelsupport.com/...ubleSignalBridge.pdf
Are you using the plug or did you cut the plug off and are using the wires ?
