Can someone please tell me which side this bracket is mounted to? I didn't get any instructions with it and I am not sure what is the proper way to mount this bracket. It is for cars that are lowered and I have the adjustable panhard rod. Thanks in advance..

 

To answer your question, t installs on the axle phb mount. It should be braced to the axle like this:

But, it is not necessary, and before you install it you should do some searching on FRRAX.com and familiarize yourself with the ins and outs of relocating the phb. There is more to it than just welding that bracket on.
Having said all of that, relocating the phb is worthwhile IMO but I would not use that bracket.