Perreaux PMF2150B Restoration

I picked up a Perreaux 2150B and working on restoration. Someone desoldered the wires from the Bridging switch to the boards.

I have the service manual, but this wiring is not well detailed. All the photos I can find are from top side of the boards.
I believe the wires go where the inputs attach, but I want to be sure. Hoping someone here may have knowledge of these amplifiers.
If I had photos from the underside, it would be easy to figure out quickly.

Thanks.