Adam,
I must have missed this completely
so.......
Did you ever resolve this ?
If so, what is the wiring going into the bait/live well?
Your seacock probably could use a little work but yes, it most likely had a pump that would fill the well.
I can't tell from this shot if/where the intake from the seacock would be. Is there another "hole" in the well not pictured?
Is there a pump under the bracket in the fish box? I see the wiring so did that turn out to be the fish box pump out?
I would think the switches in the console box energized the fish box pump out and the live well recirc. pump. I'm guessing it drained by gravity.
Let us know how it worked out. We don't see a circa 1990 CCP very often and pics of what you worked out would be appreciated. Again, sorry for the late response.
Good luck.