Parameterized battery pack with contacts

This design is derived from the parameterized Battery compartment: thingiverse.com/thing:5051 (By Guru). I have added a simple method for the electrical connections. The proof of concept was tested on this thing: thingiverse.com/thing:5070

NOW you can print your own fully-functional battery pack :-)

For every battery there are two embedded nuts in contact with the positive and negative poles. Two metal M3 bolts are inserted from the outside. They will contact with the poles. Now, you have