PLEASE LOOK AT POST #6 and # 12.,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, that's right,there is no hose for the other side of the tank,the fitting that is shown in your picture screws into the rear end after you unscrew the stock one out,and then place the other hose end to it,take a look at the upper post pictures.

 

Doogie that is a vent hole to give atmospheric pressure to the tank so fluid will drain back down the rubber line once the fluid in the diff/axle has cooled.

 

That's what I figured, but wanted to double check.

 

I just finished my install and have few tips to add...

If you are installing on a vert, the outer most hole where you would be using the supplied bolt is occupied by the middle vert frame brace bolt. Not a huge deal, but you do need to loosen the other 5 vert support frame brace bolts so you can get the reservoir mount under it.

I also was having a tough time getting the reservoir into place, but that was easily solved by jacking up the body and creating some space above the axle.

Otherwise the install was straight forward and took maybe an hour.

 

Looks like these are no longer available as Shelby has them marked "permanently out of stock".

 

I got one after spraying my right side tailpipes and rear suspension on a tight roval last summer. Sheared off one of the bolts when trying to install it (did the same to my Fays2 Watts link recently -- those Ford bolts are crap, some really are one-time-use only).
Luckily the metal bracket was bendable enough to move it to a nearby hole, don't recall what that bolt was used for, but it all fits no problem. If I'd known about that TSB and little black diaphragm, I would have gone that way, less weight, less cost!

 

I only bought mine due to the good deal I found, but since this is an official KR part and are no longer made, I might just pull it back off and install one of those cheap options... then sit on it until someone really "wants or needs" one