Its the BTB mount. I attached a plate to the inside of the frame just behind the motor mount that rises about 6" above the top of the frame. Then bolted the BTB tray to that piece and the fender. This gets it to sit high enough to clear the intake and gets it above the exhaust manifolds. The top bolts to the vertical lip of the fender between the sloped part and the horizontal part. I thought it fit pretty well and the battery doesn't feel like it is getting hot from the exhaust. You could move it further forward if not running a smog pump or OBA like I am. There is another mount that works well in that position, fastens to the top of the shock tower and the fender if I recall. I'm using 1 AWG battery cables (changed the neg since the picture), the starter spins faster than ever. pos cable is 72" and the negative is 30". Negative cable is bolted to the frame with one of the motor mount bolts ( I had to retrofit the 2F motor mount brackets since they had been removed for the previous V8. I covered the pos cable with a layer of heat shrink then a FG sleeve to protect it from heat and abrasion.
That's what I used in my 3FE swap ...
