I recently got a GOTH-3D chassis system. They are great so far! How do I install my switchcraft recharge port into the recharge port section (piece: GCM110-02-V2 - Recharge Port 2.1mm)? I can’t fit it through the small hole. How do I secure it once it is in? Also, how is it secured to the speaker holder (GCM110-03-03 - 28mm Bass speaker holder)? 4-40 rods slide in, but don’t actually secure to the holder in any way.