First we need “key”. this key can easily get from the first warden guard spawn.

First Part: Briefcase. This is located at transverse tunnel.

Second Part: Motor. Its inside the jail located on sally port. If you played Black Ops 2 Mob Of The Dead map then, you are familiar on this spot.

Third Part: Acid Bottle. Locations, infirmary.

Last: build this to any table locations you want.

Note: This can be done in any order.