Brake master cylinder failure and swap

[KAdams4458]

On Friday morning, my brake pedal went to the floor as I arrived at work. It seemed I had pedal resistance once or twice out of every ten pumps, and I knew the master had bit the dust. I left me car at work that night, and came back on Saturday with the very clean master cylinder from the donor car that supplied my four speed swap parts, and the swap went pretty well, but left me with a few questions.

my car is a '77, and has the oval reservoir with one switch built in to the reservoir and another switch threaded in to the master cylinder itself. The donor cylinder and reservoir is one of the later triangular versions, and has no switch port in the cylinder, and two switches built in to the reservoir. Mechanically, it functions fine, but I am wondering if anyone has figured out how to change the wiring around to get the warning lights to function again.

I know I could just get the right parts and put them in, but holy crap do they ever cost a lot. The gently used unit I installed is a legitimate New dealer part with only a few months of use on it, and I would prefer to keep using it, and keep several hundred dollars in my pocket.