Drill a hole through the center, and then mark where the hole/screw meets the tab. Make sure the tab is long enough/positioned right so you have enough material for the blind nut on the tab. Drill though, then drill a little larger hole so the blind nut fits in. Put the blind nut in just a little, put the canopy on and tighten half way to make sure the threads catch. Take the canopy off, put three little drops of CA on the blind nut tabs, put the canopy back on and tighten the canopy screw all the way.

The Ply tab on the fuselage side should be mounted parallell to the outside surface of the canopy, so that the blind nut generally is perpendicular to the canopy mounting screw.

Finally, drill through the top (countersink) the canopy hole so it fits the head of the nut flush with the canopy surface. Push in a small #4 lock washer, and a drop of thin CA to secure it. This will prevent the screw head from pulling its way all the way through the canopy over time.