Partyline: How are the V-Box 3-pin XLRs wired internally?
The V-Box standard wiring "out of the box" is setup to support a KB-701 single channel panel or a single channel of a KB-702 / KB-702GM two channel station. The V-box 3-pin XLRs (one female, one male) are wired in parallel and routed to a 5-pin terminal strip that is compatible with the KB panels.
The wiring diagram is shown below.