You will need to move the washer bottle to the boot with these kits, And cut out a 3" hole in the two inner wings for the pipe work to go through, So it's not as easy as people tell you if you haven't got the right tools.
I've seen a couple of right bodge ups, To do a nice neat job you will need the right tools and a bit of patients.
Tool's will a good drill or hole cutter, Some sort of grinding tool to tidy up the rough edges, Some wire cutters and new conectors, A crimping tool or soldering iron and solder, Some new wire to run to the rear.
Rob