pioneer 12" pax-30E speakers do I need to re attach, attenuator's?


Hi The leads for the attenuators have been cut off so he could remove the speakers from the cabinets.
Do I need to re attach 
Does anyone know the cubic ft needed to build new cabinets?
Can the cabinet be any shape?  Could I use the right size pre assembled sub box for these speakers.
I want them to sound good, but don't have tools to make boxes. 
thanks for your thoughts
merry
merry