Standard ladder end cap
V1 - 72 x 28 mm hole -> should have plenty of clearance (designed for the bent end of the ladder)
V2 - 72 x 21 mm hole -> should fit nicely into the straight end of the ladder

I printed this with TPU from Devil Design, layer 0.16, infill 15%, 3 wall outlines. No support needed.
Printer Qidi Q1 Pro