Damn, do you know what you are doing?
that box you show a picture of is a voltage regulator!
the 2 wires going into it are for + and - from your car, the other 2 (with barrel connecotr) plug into the monitor.
If you are using the MII to power your monitor directly, then you don't need to use the box in your picture, since the power will be regulated to 12 volts off the PSU.
Now, as far as ignition controlling on/off, please take a momoent and read the instructions that came with your M2. If you don't have them, look for them.
This little piece of paper will tell you exactly how to power the PSU on/off withg ignition on/off.
Please post a pic of this realy you speak of.
WTF? is there something in the air this week?
Darque? I need the flamethrower please.