HMMWV webasto thermo 90 fuel fired coolant heater info needed

[shoveldead]

I recently acquired a Webasto thermo 90 coolant heater for a HMMWV. I have searched the TM's, contacted Webasto directly and cannot find where to mount the unit on my 998. Google searches produce photos of the heater, but no mounting info. The outer cover has an NSN on it, so I know it wasn't installed as a field mod. Need to know where it mounts, how it goes in to the cooling system and where it gets fuel feed from. Any help would be greatly appreciated.

 

[dilvoy]

Isn't that an accessory or add on to the Swingfire heater setup that sits atop the driver's footwell?