I bought these bags at Leatherup.
Then I removed all the straps, buckles, yoke, zippers etc. I had to cut the top edge off the back of the bags to remove the zippers. Then finished the raw edge by lacing a piece of vinyl over the top. Contact cemented the vinyl strip on first then punched the holes with a large hot needle (bags are vinyl) then laced.
Next I fabricated ghost brackets from 1/4 in. aluminum stock. The bushing on the left is fastened to the bracket with a 5/16x18 bolt. The smaller threaded hole is an M6x1.0 and the bracket is fastened to the bag with small bolts and washers from the inside of the bag screwed into tapped holes in the bracket - four across the top and two at the bottom.
I replaced the upper fender rail bolt with a longer one (I used a 5/16x18) and secured it with a coupling nut cut to the needed length.
Here you can see how the bushing fits into the rear hole of the fender rail where the signal light was originally mounted. The mounting bolt (with washer) fastens through the hole under the fender rail the same way the signal light was fastened.
Here are a couple views of the mounted bags. I used a stainless acorn nut on the front mount. Both bags can be removed (2 nuts and 2 bolts) in about two minutes.
Made velcro fasteners - very easy to use and no buckles to fumble with or straps to get in your way.
Pappa's got brand new bags!