Posted on 29 Oct 2016
OK, understood.
Basically you are looking for a permanent live feed.
There are 3 simple ways to do this.
Quick and dirty.
1) Trace wiring from monitor to where it joins vehicle wiring disconnect or cut it. insulate (tape cut end).
Then A
Crimp connector (bullet etc) to end from monitor. Buy cigarette lighter plug attach wire to it and crimp opposite side of connector to it.put in cigarette lighter socket.
OR B) Connect to a permanent live feed - often a cigarette lighter but can be radio etc. by soldering to back.
BEST .
Run a new wire from positive terminal of battery through existing bulkhead holes - or from leisure battery. Make sure in line fuse is included. Only needs positive as negative will be permanent connection anyway. Then join to existing (ignition fed) feed by cutting, crimping connector etc as above.
You will need to purchase a 12v "needle probe" in order to verify live feed unless you use cigarette lighter feed which can obviously be tested by using lighter with ignition off.
Hope this helps.