I am trying to attach a newly purchased solar cover reel to the reel system. The instructions are horrible and different parts came with the reel and with the tube. Attached is a picture of the tube, the handle end and the tube insert (this one came with the tube and fits it) and white thingamabobs which fit in the end of the tube but don't seem to attach to the inserts. There's bolt holes running through the tube and inserts but if I run a bolt through there it blocks the handle. HELP!