Welcome to the madness, your user name suggests you might be a Shadows fan.

As Deady said feed the wiring in through the pickup holes and feed some 6mm tubing through the pot holes, slip it over the pot shafts and it will make getting them in place dead easy.

Also build the loom complete and mount it on some cardboard ( kit lid ) to make sure everything works before you have to reach for the Tourettes dictionary when you discover problems after fitting it up without pre test