Hey Wilson, here's some pics...mounting is you place where you want it on rack, from bottom mark locations on underside and then you drill holes for a mount metal mount bracket to mount on seat, then u bolts from inside bins to your rack, looks like a little weather stripping can seal boxes ( lockable ), or I figured drill drain hole with a cork if not worried about a waterproof storage.
Stuck in 1st? Had this exact problem with an 05. Ended up being 2 things, shift motor brushes worn out, (replaced the motor & would then only shift in auto) & connectors on the front end were dirty. I would def/ check the shift motor 1st thing.