I wired my monitor power cable to the +12 and GND of a Molex connector to plug it into my PSU.
I've been running my entire system of the M2-ATX. Intel board, Monitor (LED Lilliput), SB Audigy PCI, Hard Drive (to be replaced with SSD soon), USB DVD-ROM, GPS, EVDO, etc.
2000 Ford Expedition Eddie Bauer - Bi-Fuel Gasoline/CNG
Intel D945GCLF2 w/512MB RAM, CL Audigy w/KxProject, M2-ATX, Lilliput EBY701
2004 Impreza WRX CarPC Install
I am willing to host any legal downloads that may benefit the CarPC community - PM for info
"When you go 0-60 in 4.5 seconds, you don't need a made up character called fast. Thats what makes a Subaru, a Subaru."
But how much Ampere can the Molex take? My monitor eats 3A @12V
probably OK with that, a lot of graphics cards which need 6-pin PCI-e power ship with a 2 Molex to 6-pin adapter, IIRC the 6-pin connector is good for up to 75W, which means each Molex should be half that, or about what you need.