I now know that I understood the requirement properly. See my diagram to understand what I meant. A picture speaks louder that I can explain myself. It is in effect a patch box extended. It saves having 3 cables running from the amp to the board and can be switched easily
Switching setups involves moving ther cable from the top row in to go to the bottom row out.
You could also use the snake to connect an amp pedal (typically stereo) if you wire one of the sockets appropriately.