The Shadowed Throne: Pack-a-Punch

The Ubersprengen

On The Shadowed Throne, the Pack-a-Punch Machine, the Ubersprengen, is hidden in a broken elevator of the Destroyed Building, the area behind the second door of the Underbelly. It needs the Wunderbuss and an explosive that can be thrown.

Upgrade

5,000 Jolts for the first upgrade of a weapon.

Ammunition

4,000 Jolts to refill an upgraded weapon at the machine, even a weapon of the Mystery Box. The weapon locker of an upgraded weapon also sells its ammunition.

Camouflage

On this map, upgraded weapons take an ethereal sheen of blue and orange.

The two fuse boxes

The caged-off tunnel of the Underbelly, with the fuse box on the wall behind the bars, The Shadowed Throne, Call of Duty WWII Zombies

In the Underbelly

On the wall of the caged-off tunnel, behind the metal bars, near the door to the Destroyed Building.

In the Destroyed Building

On a wall to the left of the elevator, near the Waffe 28 locker.

Opening it

Blow the cover off each fuse box with a thrown explosive: frag, sticky or satchel. The S-Mine and the throwing knife do not work.
Build the Wunderbuss in the workshop of the Apartments.
Fire the beam of the Wunderbuss into each open fuse box, for about ten rounds of charge each.
Once both boxes are charged, the elevator of the Destroyed Building comes down with the Ubersprengen.

The beam of the Wunderbuss charging the fuse box of the Underbelly behind the bars, The Shadowed Throne, Call of Duty WWII Zombies

The Underbelly box

Charged through the bars of the caged-off tunnel.

The beam of the Wunderbuss charging the fuse box on a wall of the Destroyed Building, The Shadowed Throne, Call of Duty WWII Zombies

The Destroyed Building box

Charged from the floor of the building, a few steps from the elevator.

The Ubersprengen in its elevator, upgrading an MP-40 between two glowing coils, The Shadowed Throne, Call of Duty WWII Zombies

The machine

The elevator stays open for the rest of the game.

Opening it for the first time gives the achievement Das ist gut.

In the First Room

One of the two fuse boxes is in the Underbelly, in sight of the players, but the Wunderbuss needed to charge it is built behind the doors and the elevator is in the Destroyed Building. Doors closed, the Ubersprengen stays out of reach.