Lionel 313 Bascule Bridge contact switch schematic

[OhioZephyr]

I'm having issues with my 313 bridge. Once bridge returns to the down, rest position the insulated approach track does not energize. I suspect the problem is in the series of contacts connected to the wire terminals. To complicate matters one of the small rubber insulators fell out when I removed the bridge from the layout. 

Does anyone have a detailed picture showing where the spacers go between the contacts?

Thanks in advance  

Jim