this is going to sound pretty n00bish but i have a tview T6400FD and the plug is sort of like an s-video plug, the round kind, but obviously it isnt since it needs 12v input, what kind of thing does it plug into??? can i get an adapter or something?

i bought the thing for 50 bucks because someone said it didnt work, i knew better... or at least i hope i did, i can get it to power up by putting 12v DC to the right pins, but i dont know which pins are for video signal, it would help alot if i knew what kind of signal it needs and what its SUPPOSED to plug into

any help would be greatly appriciated