White M3A1 AOP Windshield and Door armour

[motto (RIP)]

Try this Darryl. I've measured as well as I can and it should be easy to follow.
A line drawn through the two upper hole centres is 2-5/16" above and parallel to the upper edge of the port cut-out.
A line drawn through the centres of the two forward holes is 1-3/4" forward of and parallel to the forward edge of the port cut-out.
The forward hole centres are 6" apart.
A line drawn through the centres of the two rear holes is 1-1/8" aft of and parallel to the aft edge of the port cut-out.
The rear hole centres are 5" apart.
Don't hesitate to ask if in doubt about any of this.

Dave