G&G combat machine buffer tube help

[Tiddles999]

So im putting a new etu into my old ass combat machine and ive hit a snag with the battery cable. The deans cable wont fit throught the buffer tube and the inset in the tube is molded in and block it image attached.
Ive got a replacement buffer tube but the lower reciever extension to mount the is too long to secure it annd stock slides along.
Anychance someones come accross a similar issue and knows a way to resolve without cutting the extension?
Im not going to chip and solder a new etu. Ideally just swap in a buffer tube with removable insert.
Appreciate any help here i have been at my whits end on this for far too long.

 

[-davo-]

G&G usually have their wiring spaded due to this design

Your choices are to either:
chop and spade your etu wiring
bore out the buffer to fit the deans
change the buffer tube and possibly screw/plate to one with a more convenient design