[strike]Check your documentation, it should be the two pins that go to the power button. I'll try to find that information from there though.[/strike]
I thought that image looked weird... this is a tv board... not sure you want to mess with this. It's probably the PS_ON and one other pin but that's just a guess, probably ground. (this should turn the power supply on but I'm not sure how this is wired.... so....)
You should try calling Samsung and seeing if someone will email you the tech sheets on this model or if an engineer will talk to you, you won't be able to find much information around here unless you run across a TV repairman or something similar.