The holder for the 4 AA cells is screwed to the motherboard, I couldn't find a new one like it. Luckily, Keystone still makes the wire springs that (seem to) fit into the plastic!
Isn't that cool?
https://www.keyelco.com/product-pdf.cfm?p=14216Originally I wanted to harvest the springs from a new holder but they use riveted contacts or sometimes a little metal plate. Not one used this little binocular thingy. Also the 102's pack solders the springs right into the board, no wires. I was also able to get the springs for that although I will have to do some bending.
I might never get this thing to work but at least it'll be clean enough.