OK, first thing was to find a decent place to put it and to be honest this was really the only suitable place as it was flat.
The battery came with a foam that wraps round the battery and holds it toght, preventing any kind of vibration.
Once this was fitted, trimmed and then the battery housed inside the clamp, it was simply a case of holding the battery / clamp in place and marking where I wanted to drill the holes.
I drilled the holes then bolted it down securely with some bolts and washers.
I then took some earth cable and new eyelets, measured how much cable I need and cut it to size, then fitted the eyelets.
I secured the earth point to an original threaded hole on the far side of the footwell and then attached it to the battery.
Then was the positive lead, which I simply trimmed back to the correct length (as the battery used to be in the boot) and fitted an new
eyelet, then secured to the battery.
JOB DONE!