.....i bought a 2.5 mongoose system for a S1 (but i believe they're interchangable to S2?) to fit to my Turbo Technics RSi, as the RSi exhaust runs a different route to the S1 exhaust ive got a couple of questions

Firstly on the section that runs around the rear suspension there's this hanger, where is it supposed to go? theres no exhaust hanger on the RSi? is there one on the S1 or do i cut it off?
Secondly i got this with the fitting kit, what is it for, where does it go and is it something to do with the hanger in the first pic???
I would greatly appreciate your help