View attachment 113281
The short bolts at the widest part of the tool tray come thru tabs on the frame and secure the rear part of the tray.
The two bolts in the middle of the tray are securing my Podtronics rectifier/regulator.
The bolt in the "neck" of the tray secures the front of the tray. Originally, this bolt had a nut under an "L" shaped bracket welded to the frame. I tapped the hole with a thread to eliminate the nut. Not purity, but for EZ on / off.
The long thru bolt above the tray has nothing to do with the tray, as you can see. I do think it is necessary for frame rigidity,
HTH, Slick