I recently received my IB-1F kit and am having some confusion bout how the barrel output jack is supposed to be mounted/installed into the guitar body. It appears that the only way to secure the jack into place with the nut and washer would be to insert the jack deep into the guitar body, but this would make it impractical to insert an instrument cable. I've never used barrel output jacks or mounted an output jack on a guitar in this way so any help is appreciated.