I replaced my hard wired foot switch wire with a Neutrik 6 pin connector back in 95. This ended my tangle of wires I was 'carefully' shoving in the back of the amp during tear down, all the while trying not to burn any on the hot tubes. I also cut off a 5ft. section of the wire and added ends to it. This gave me a short cable to use when I just wanted the switch in front of the amp. One added bonus I gained was that by putting the connector on the foot switch, it also allowed me to wire the foot switch into my long snake by using (2) of the channels and connecting 6 pin ends.
All in all, the foot switch mod has been great. In 13 years, it has not had 1 problem. The Panel Mount connector I wired into the foot switch didn't fit perfectly with the screw holes (as seen in the pictures), but it was close enough to be secure and sufficient.
I believe these are current versions of the parts I used.
Verify them to be sure.
6 Pole Panel Mount Connector
http://www.neutrik.com/us/en/audio/210_t2_346005876/NC6MP-BAG_detail.aspx
6 Pole Rt. Angle Connector
http://www.neutrik.com/us/en/audio/210_t2_701166793/NC6FRX-B_detail.aspx
6 Pole Straight Connector
http://www.neutrik.com/us/en/audio/210_t2_956058614/NC6FX-BAG_detail.aspx