Are you using Dunlop or Schaller? Schaller has a threaded post that goes through the peg hole in your strap, then you have to push hard on the nut and tighten it on. Dunlops have a clip that slides on the post sideways instead of a nut.
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"Jesus is my bassline" Immedicabile vulnus ense recidendum est, ne pars sincera trahatur