[happy1]

Hi,
Territory has harnesses built the same way as Falcon BA/BF, same principles, same plugs, but specific for Territory, a little longer, a few differences.
There is one harness across the dash, with plugs in each footwell. And there is one harness for each side of the cabin, from the footwell to the tail gate.
There are also one harness for each side of the engine bay, these plug together at the footwell plugs.

There are two fuse boxes. Engine bay fuse box and relay box supplies the engine modules and headlights, fans etc. The internal fuse box near the driver's knee supplies all cabin functions including the seats, audio, dash functions.

If it's a small fire under the seat, suggest that you only need the two cabin side harnesses, perhaps even only one of them. It shouldn't be necessary to do the dash harness and fuse box, unless wires have melted there too.
It also depends how it was extinguished, for example if the fire crew pumped it full of water, it would need everything that has been wet to be replaced.

Also, first of course disassemble the seats, centre console, and pull out the floor carpet etc, to see if any sheetmetal needs re-painting first.

Suggest that you discuss with the inspection station at the beginning of the work, when you have taken out the seats, taken some photos etc,

Most importantly, you need to disconnect the damaged harness from the main harness before you attempt to put the battery back in.

The cabin side harness on the Left side carries the fuel pump power, so you can't get it running again until you have plugged in another side harness.

Since you have electric seats, is it a Ghia trim level? You will need harnesses from the same trim level, and exactly same year. For example if you have an SX, you need harness from a same year SX, (not from an SY).

Cheers,