Just for reference for anyone else looking for this info for the future.
The bracket mounts on the rear midshaft holder, the one the mounts to the hull going to the pump.
Looking at ski from the front the rear midshaft holder has 3 bolts holding it. The bracket mounts to the right rear mount. I was able to get to that area by unbolting the electric box and then removing the coupler shroud. I then removed the right top bolt.
The bottom basket of the rule 500 gph pump mounts to the bottom of the bracket. I used some stainless m3x8 socket pan head bolts and nuts from the hardware store. Blowsion predrills the 4 holes for the pump, but these put the pump way too close to the couplers. Infact the pump hits the coupler!
So what I did was redrill the holes closer to mount the basket closer to the back of the ski as well as to the port side of the ski. This gave the pump about a 1/4'' clearance all the way around. I also position the pump so the outlet was to the starboard side of the ski, slightly back so it now runs under the coupler, and exits above the exhaust and below the electric wiring.
I wish I had some pics, but I through it together because it was getting dark and I want to ride tomorrow.
Hope this helps someone.