No problem, I was hoping I could spare anyone having similar problems the frustrations I had 
You just open the controller and you will see the bulkhead is just connected to a mini USB on the board itself. Get rid of the bulkhead and just connect directly to the mini USB, have a look here.
I don’t have my controller here but if I remember correctly I just opened it up on both sides and semi-disassembled it into 3 parts, so I had access to the board, should not be a huge effort.