Where do the electrical wires on a 1982 c10 proportioning valve goto?? Thanks!

To the brake lamp bulb in the dash. One is grounded, and the other goes to the lamp. When one chamber or the other in the master cylinder exhibits a pressure loss, the switch is grounded internally, illuminating the brake warning lamp to advise of a problem (as if the soft peddle and fluid everywhere wasn't enough of a warning;).)

Thanks! I was thinking about taking it off 82 model and putting it on 95. ABS might be shoot and $550 for a new one on an old work truck I paid $1000 for.

Thanks! I was thinking about taking it off 82 model and putting it on 95. ABS might be shoot and $550 for a new one on an old work truck I paid $1000 for.
The master cylinders will most likely be different, thread and volume (size) wise. What's wrong with the '95???

The master cylinder should be less than $50. The ABS can be offlined easily.