Please lads,
Eventually getting time to look into this fitment, it turns out my son is now a Auoterm agent, he's asked me to get the parts needed to mount a 5kw unit underside. I already have the OE diesel heater that pumps hot air through the heater vents but this has limitations, mainly only being able to use it three times a day and 120min time limit before have to move.
Looking at diagram, I guess all I need is 2, 4, 6, mounting brackets, and 10'11 mounts, also plastic shield 13.
How does 6 fit into 2.