That shows the tape reference on the top for the right angle. Be aware it'* VERY critical you hit the EXACT spot on the back side, and it'* very difficult to place a nut and washer back there. I welded a box-end wrench to that nut, and left it in there to 'back up' the nut when I'm adjusting tension on the bottom side. The wrench is captured between the mount and trans to prevent it from rotating naturally (then I cut the open-end of the wrench off). The wrench stays long-term on mine.
In the pic above, the gray washers and nuts are standard. I chose 316 stainless. The gold washer comes with the endlink kits (Energy Suspension poly endlink kits, or buy the universal bushing/washer set). The blue nut is a nylock for safety to make sure it doesn't work loose.
To adjust it, I back the nylock off until its flats are aligned with the nut between, then use a deepwell socket on BOTH, to either add or remove tension. Then I tighten the nylock back against the other nut when I'm done.
Let me be clear......it'* very easy to MISS the little pocket in there that you need to hit, so use the spotters as I detailed in MY PREVIOUS POST ABOVE.
Here'* some components, but I didn't use all of them:
A little more info back on page 3 of this topic you should read, including more pics.