Well we feel that a readily removable electronics board is kind of unnecessary, so we just screw fork connectors onto the victors for all of the motors. If need be, we can get the electrical board off in under a minute, as opposed to 15 seconds if we had spent a whole lot more time designing and building it. To answer your question though, I know Terminal Supply Co. sells some very nice multi-conductor connectors that you could use. We always use that company for components like that because there is a relatively local supplier and they sell high-quality parts. You can order parts from their website too though:
http://terminalsupplyco.com/