Hi Cameron

The rear bumper has a fixing either side
They are plastic turn buttons for want of a better description
There is also two plastic shoes that fit in the body either side that the bumper lugs slide into
The main bumper irons are held in by two torx bolts in the top of the chassis rail in the boot.
There are no rubber inserts in the ends of the chassis rails
You have got height adjusters both sides too.

Cheers Tim.