Disco 2 Question about over temp alarm (watchdog tm2)

Hey guys. Time to add an engine overheating alarm.
Seems like there are basically two options: low coolant vs. temperature alarms.

Based on a brief research I like the temperature alarm better. Is this really the best option for a td5?

If so, I will be purchasing a watchdog tm2. Does anybody here have one installed?

Can you give me a roughly idea on how to install it? Which bolt yields the best monitoring results on the td5?

How to wire the sensor to the cabin? Where to place the display and how to power it?

Thanks!!

Should upd i consider something else than the tm2?