Airsoft Batteries Explained

need help plz batteries look?

Ok, so I have an airsoft gun, it is electric Meens it runs on batteries. but I a problem I lost the cap to the battery slot. so I have the flat portion of the batery touch the spring in the barrel. no problem. but I the other part of the battery to touch anything. so that the gun dosent have enough energy to run if someone did not do what I can do to solve this problem. or can someone tell me what they are parties. plz im trying to be accurate, but it's hard to explain and plz its end and bear with me.

The same thing happened to me with a stereo! What I did: I had a trombone, got taped, bent the paper clip to attach to cells (possitive negative touch (you'll need two clips for this) then I recorded it in place. It worked fine for me, good luck.

ICS M4 Crane Stock Airsoft Gun Takes on a bag of chips