Alright, i pretty much have a blank body(it has a cavity for a single coil, but i wanna put in humbuckers and its a pretty ****e guitar anyway)

so what i wanna know is:

how do i rout this out with the proper holes for the wires without using a pickguard? or am i going to need to aquire a pickguard?
Arbor A410 Bass
Dinosaur 20 Watt Bass Amp
Line 6 Spider III 75 Watt
Squier Bullet

Excuse me sir, have you been thinking tonight?
route the pickup cavities, then in the back you'll need to route out a cavity to house the electronics. Then drill a hole from the cavity in the back to the pickup cavities for the wires, and holes through the top to the back cavity for the pots and switches. That's basically it.