Garry: My computer is not reading my camera memory card so I will try to paint you a word picture. The screws are (US) #3 or #4, oval head phillips screws, 5/8" long. There is a finishing washer under each screw head.
There are a total of 10 screws.
Starting at the top center of bow, the first screw is 4 9/16" from the centerline. The next screw is 9 3/8" away from the first.
The screws on the sides are:
The first is 4 5/8" from the bottom edge of the side, the next is 5 3/4" above the first and the uppermost (on the side) is 5 9/16" above the second.
5 screws each side, symmetrical about the vertical centerline.
Do you have screw holes in the top itself to verify these dimensions?
Hope this helps
Gus