The photo at left shows the shrine with one toggle extended and one in its recess.  With the caps off, you can see the holes for access to tighten the shrine against the wall surface.

Check that the toggles pivot freely, tuck them into their recesses, and center the shrine in the hole.  See that it sits level and there are no gaps visible around the perimeter.  (If your sawing strayed too far outside the line, shift the shrine to cover them.)  Use a Phillips-head screwdriver to tighten the toggles, which will swing out from the sides and snug the shrine firmly against the wall.  Do not over-tighten the screws,  which could cause the screws to strip out.  (If you use a powered screwdriver, use the lowest torque setting and then check tightness with a hand screwdriver.)

The last step is to cover the screw holes with plinth and capitol caps.  The larger caps, (plinths), go on the column bottoms, tight to the horizontal step.  The smaller ones, (capitols), go on the tops of the columns and should just cover the line between column and arch.  The easiest and best way to attach them is with a small amount of hot-melt glue from a glue gun applied to the inside of the caps in such a way as to avoid squeeze-out.  Hold the caps in place until the glue cools and firms up.  Double-sided tape would work as well, but the foam-type tape should be avoided, as it is too thick and will leave a visible gap between column and cap.

The installation is now complete.  The only thing left to do is vacuum up the dust and fill the shrine with something you like.

Please send questions and comments to me at:  jedahlborg@gmail.com