Ok how do you want it to work? Master vol or two seperate vols?
I'm assuming 2 separate:

In which case do the above. Though bear in mind that bkp pups will have different colour codes. You'll get instructions that show you what. Assuming you're not coil splitting. For a 4 wire jobbie, two go together, the neg will go with the shield wire to the back of a pot (as will everything you're grounding) and you'll have a hot line. If you've gone for 2 conductor it's even easier, braided cable to ground, line in the centre is hot.
Your EMG wiring will have a stereo jack to switch the battery on and off. I'd pull this and keep it with the rest of the EMG harness. Stick a mono in and wire it as per the diagram
When you take it all out you'll be left with a wire that dissapears into the guitar. That's the ground for the bridge. As with all the other grounds, take it to the back of a pot.