OK,you have a really cool (or really EXPENSIVE) guitar strap that you would LOVE on your banjo?
SIMPLE!!!
Go buy two(2) Martin Button straps and put the guitar strap on,NO drilling,NO scratching the finish,NO loosening brackets.It is done in less than 5 minutes!
Put the Martin button straps through the holes on the strap ends and put it through the brackets at whatever point is comfortable,button them up and you're ready to go.