It has connecter that connect to a adapter which connects to the battery. All JG and G&G guns have the peice that you need, it is in the grip and all u do is disconnect it and reconnect it to the new gearbox.
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0 of 1 people found the following review helpful:
Question PLZ ANSWER
April 7, 2010
Reviewer:
Sam Cluff from VA
does this gearbox have the battery connecting wires cuz im promblaby gonna get it but i need to kno cuz i dont wanna waste 50 smackers on this thing. im upgrading my dpms panther m4 that i got from dicks, used to be 302 fps
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1 of 2 people found the following review helpful:
stubby killer upgrade ?
February 2, 2010
Reviewer:
Alex Campbell from Carlsbad , CA United States
anyone 
Question PLZ ANSWER 