Found a helpful image.
Ok, the wiper (center lug) is where the signal lead on the Bisonic is normally soldered to, am I right? Ok!
Let's take a look at the switch on the pot. There are actually two slide switches on this, but you are only going to use one.
Think a bit on how you are going to play. Are you going to use the stock winding on the pickup or the Novak overwound winding. I'd figure you want the Novak overwound sound.
Solder the lead from the overwound coil to the terminal (lug) on the lower left side, then solder the stock Bisonic winding lead on to the upper left lung. Now solder a short jumper wire from the center left terminal, and run it to the wiper.
When you are playing and you have you volume switch pushed down, the left center and the left lower terminals on the switch are connected. That allows for the signal from the full overwound pickup to flow from the the terminal on the lower left to the center terminal on the center left, then to the jumper, and through the pot, out to your SVT.
Pull up on the volume pot, and the center and upper left terminals are connected, and the same thing happens with the stock Bisonic winding. The lower output signal flows through the switch, through the jumper to the wiper, then exits through the volume pot.