Hi Guys,
The holes are for stainless steel 316 self taping screws or similar and the right size is 12 gauge, length depends on the handle thickness 5/8 worked for us.
We used a dolphin rescue board handle that Bulldogpup sourced and had to use some roofing bolt spacers to raise the handle slightly but the result looks like it was installed during manufacturing.
Jobs done in 5 mins and can be removed in 30secs
Phill


