Black Ops 2 Zombies pack a Punch Machine Guide will show you how to accomplish this.
To get the Black Ops 2 Zombies Pack a Punch Machine parts location you will need to continue and follow where the pack a punch is in the vault after you blow up the first to doors, you will need to place a turbine on the door with the green and white lightning sign in the place where you turn on the power, and then get to the vault door and the part that also has the green and white lightning sign will now open and you can go down into the basemen in there you have to find parts to build the pack-a-punch machine parts and you can assemble it now. Also a hint is that you can find this in the last bus stop.
TOC: Walkthrough, Review, Zombies Survival, Zombies Tranzit, Buildable turbine guide, Black Ops 2 Intel Locations, Bus Upgrade Parts, Best Perks loadouts, Grief Walkthrough, Teddie Bears Locations, Control Panels, Best Assault Riffle Class