Hutzal, that's not a bad idea actually...the hole is pretty far recessed into the cabinet, but that might work. I've never tried soldering, but i can't imagine that would be too involved, putting two wires together wouldn't be very difficult.
If i went with the wall plate I may even not worry about mounting it on the wall as it has banana-type connectors on either end. Just buy a load of banana plugs to make sure none of the wires touch and call it good.

Steve