Dave Sr. from SWISCO responded:
March 30, 2016
I don't believe the shape of the peg should be a problem as long as the outside diameter of the peg matches the size of the hole where it installs. The peg is most likely shaped like that to keep it tight into the hole, but it's not necessary for installation. If the peg shape is too large in diameter you could try filling it down just a little so to fit into the hole.
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