The bottom of course. Basically you want the angle of the upper a-arm and tie rods aligned perfectly, or pretty damn close.
You can see the angle of mine in my signature.
Steering geometry is what's up.
Anyways, check what Starwriter said above as I bet it's turning to far or the stop has wear, mine was both worn and bent. Also if you have some crazy offset wheels it will steer funny. When I went to a 4+1 front Baja wheel it was a huge improvement in bump steer and handling. But that's another topic... Just sayin.
Sent from my shed.