The first mounting point under the car is on the rear beam (one either side) and another at the rear behind the bumper. I've got the same mounting point on my gearbox but I've never had anything attached to it. This was in use on my old 1.8 so I think its just a generic part they've used.

I could be wrong but neither my standard exhaust or my Mongoose one have a bracket further forward than the rear beam.