Dual Powerlet outlets installed as shown--direct (fused) connection to battery.
As I recall, I found a z-shape bracket and attached it to the flange in front of the shock absorber mount.
Left side and the battery is just a foot or so aft. Hope this helps.
Here is a closeup detail of the outlet bracket ... this unit was abandoned (partially completed) for a single outlet. I put this bracket aside in favor of the two hole version shown in the previous post.
My recollection is that I used two 4mm stainless bolts to fasten to the shock absorber flange to minimize compromising the strength of the shock absorber bracket.