Ah, yes, the 264 RB does have a clear panel, which would be used for the backup light. That accounts for the Backup light input, and means you don't have to grub around behind the refrig.
It comes on during the running light test, as you noted above. That accounts for the Running Light input.
I'm not sure what TM did with the Stop/Turn input. Perhaps doubled it up with the running light input?
Anyway, it sounds like you are out of the woods, and everything is working acceptably.
Bill
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