Being an owner of a ASUS G75VW-3D model, you need both connections for 3D operation. The 3D version motherboard will have both connections and the 2D version will have only one. In fact the main video connector is even different between the two models.
Usable 3D version motherboards are getting very rare, lots of bad motherboards but a usable 3D board is almost unheard of anymore.
Save your money and invest in a newer laptop.
I stand by what I stated earlier, the 3D version motherboard will have larger video connector and emitter connector. I suspect you have a motherboard with a upgraded video connector but no emitter is for an upgraded display but not 3D.