I want to mount the board in an enclosure which means mounting the volume control and binding posts off the board and on the enclosure. Suggestions on the type/size of the cables to do this?

Yeah, sounds like the OP is talking about wire. I”m doing the same thing with my ZKIT - chassis mounted RCA jacks, attenuator and tube sockets. I bought wire from Parts Connexion (no affiliation - I just bought meters there so also used the site to pick up the wire). Sonic Craft also has good wire. There’s debate whether stranded is easier to use than solid core, though it’s not a huge difference. My only recommendation is not to get Cardas Litz wiring. That stuff is difficult to work with - each strand of wire is individually wrapped on plastic, which means you have to melt it all down before making a connection. Total PIA if you don’t have the right equipment. I went with the Neotech, iirc.