Overview of the Power Path
Adam Doyle is providing some photos for this guide.
12
Battery -> 0.5m Cable -> Midi Twin Fuse Holder (2 x 30AMP fuses) -> 7.25m Cable -> PCM -> Junction BOX -> Tiger
24
Battery -> 0.5m Cable -> Midi Twin Fuse Holder (2 x 30AMP fuses) -> 7.25m Cable -> Junction BOX -> Tiger
Turn System On
Turn the system on and wait until the monitor is turned on and displaying at least the "camera loading' screen or j-Track.
Disconnect Battery Connector
Locate and disconnect the 'BATT' connector from the TigerMX. This is on the bottom of the right side.
Once disconnected note if the monitor is still on (interact with the screen just to be sure it isn't frozen), it should still be powered on - if not please me know.
Reconnect the 'BATT' connector.

This 2nd part requires someone to check the network connectivity of the system - please give me a call when you're at this stage and I can check this. (or anyone that has access to ping the IP address of that truck)
Disconnect Isolator Connector
Locate and disconnect the 'ISO' connector from the TigerMX, this is above the 'BATT' connector.
The monitor should turn off but there should still be network connectivity.
Leave this disconnected for about 30 seconds (this will drain the charge in some internal components).
Reconnect the 'ISO' connector. The monitor should turn back on quickly.