I'm gunna add some piccies to this one of these days.. be patient. Here's the words tho:

You want the speakers connected
You want the bulk of the cable hidden in the box.
You want to see the minimum of cables on the sub.

I shall assume we're using a traditional DVC sub (one +, one - each side of the sub), hence there will be 4 conductors (2x +ve, 2x -ve) per sub.

Run a thin gauge speaker cable (say 10g) inside the box, like you normally would.
Invert the sub onto the box, mark out the mounting holes.
Drill thru the baffle where the 4 screws closest to the terminals are.
Run the cables out of the box, thru those holes, out thru the mounting holes of the sub.
Run a bead of sicilon around the baffle where the cables come thru (ensures a seal).
Hold the sub down with 4 screws.
Loop them behind a basket leg and secure them.
Run the speaker cable up the leg, then into the terminal. This bit will be fiddly, depending on how hidden you want the cable.


Quick FAQ:

Q. How do I Series (or Parallel) my coils ?
A. Inside the box, too easy. It doesnt matter WHERE you make the series/parallel joins, be it along the cable, at the amp or at the sub. Just make sure you check with a DMM to make sure the impedences are correct before firing it up.