My Bimini needs to install on the metal railing that holds my windshield.

This does not please me, but I have seen others this way and I really can't
figure any other place to put it.

My question is- How do I get the hardware to screw tightly to the rail
without going so deep as to hit the edge of the glass?

Is there a trick to this? Or do I just have to use common sense on this
one?