(home made lightbox) Keeping backlight on - which pins to bridge on monitor psu board

thought id seek a bit of pro advice from the forums for my first post as im totally drawing blanks on this one!.

i am trying to finish my custom lightbox made from an old hanns.g hh281 monitor. at the moment, when powered on, the backlight turns on then off after a few seconds as no pc signal is being received. 

i have taken a picture of the connector to the main board as i cannot figure out which 2 pins to bridge to keep the ccfl backlights on :-(

i was guessing one of the ground pin and the on/off  would work but didnt want to mess this up on the first go .

any input would be a godsend!

thanks all!

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