Why would you run such a heavy wire into your cab?
I would highly recommend installing a bank of relays to switch the lights from under the hood of your truck and control the relays with light gauge wires to your switch inside the cab.
Not only does this eliminate passing a high current carrying wire through a jagged hole (grommets do wear eventually!), but it also allows you to switch meer miliamps of current with your switch, which opens the door for using any kind of style of switch you want vs some massive high current beasty.