BSA Optics BOWRD30CP - Manual (Page 7)

NOTE: Whether the drawstring passes through the center of
the red dot sight. If the string passes to the right of center, one or
more riser spacers must be used. (see pg. 2) Start with the smallest
spacer, No.1, and attach the mounting plate to your bow with the
spacer between it and the riser using the hex head mounting bolts
and washers.
Tech Tip #3: The BSA ® BOW Mount is a versatile kit which may
be fitted to nearly all modern bows. However, when attaching the
mounting plate to your bow, you may find where the red dot sight
has interference with either the cables or the riser. In this case, the
rail may be reversed on the mounting plate. This will change the
mounted orientation of the red dot sight forward or backward by
approximately one inch.
1d) Perform the quick test as before, orienting the bow so that the
string runs through the center of the upper limb, through the red dot
sight, through the center of the arrow rest and down through the
lower limb. Does the string pass through the center of the red dot
sight? If it is still to the right of center, try spacer No. 2.
1e) Using trial and error, select the correct spacer or combination
of spacers necessary to allow the draw string to pass more or less
through the center of the red dot sight. When completed, your rough
windage adjustment has been done.
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