Mono install questions

[YammyRX1]

Just finishing up a swap from Proaction to Mono Shock suspension and I'm curious about a few things:
-why is there a triangular shaped bracket on left side only?
-does 6.5" look like the right dimension between mounting hole and RA adjuster?
-what is the purpose of the weld-nuts on the brackets and is the thread the same as the skid mounting screws? I tried one from the inside but it is very tight and I thought maybe there was a locking feature.

Thanks

 

[SHodas]

Triangle bracket is for rigidity, it has a thru bolt. 6.5" is about right, just measured mine. The other has a large allen bolt, also for rigidity. All those rivets alone aren't enough. When you install, do the front first, find a helper, it's a pain getting past all the rivets.