Just got one of these for my Aopen mini pc. Noticed that on the card there are 2 conections for the antenna. One is labeled "Main" the other is "Aux". Which one goes to the stubby antenna?

Also, noticed that on inside the computer there's a white wire with the same antenna connector on there just floating (not connected). Looks like that wire is going to the front of the pc towards the power button. Any one know what that cable is for?