Subframe connector help?????

I have a 2001 mustang. I bought the Mach 1 subframe connector kit from LRS. The front mounting holes are already pre drilled and tapped but the rears have clamps to mount them. Any advice, pictures, diagrams, etc. as to how to mount the rears correctly please let me know I would appreciate it. Or if you have dealt with them and have a sugesstion please send my way. Also I think they are on the bullit, conv.s and cobras not to sure about that but I heard that somewhere. I also plan to have them wleded on once setteled good idea yes no? Thanks.

Thanks for the advice GDT appreciate it, yeah I am going to have them welded on but I am still going to bolt them in first just like it came from the factory and then I have the bolts plus the welds for double stability and peace of mind. Do you know of any reputable places down by Tampa that is where I am close to.