A-style mandolin strap 'location'

[pops1]

I always take them out, I don't like them in the heel as they get in the way. Headstock for me and it balances very nicely thank you.

[mandolindude04]

Right after I bought my Breedlove crossover online from Guitar Center, I went over to Tandy leather company and bought a leather shoelace to tie my strap to the headstock. That was a couple or three years ago. Today I installed a pin, and I like how it rides on my shoulder better. I did it myself.

[mandroid]

I had a A40 with out a button on either end. and coped somehow,.. cords and knots..

[Bill Cameron]

I recently contacted Collings to get a matching button. They told me to get one from Stew Mac and put it 3/4 of an inch down from the bottom of the fret board an 1/2 inch from the body. I bought one locally (cheaper and no S&H) and did it my self. Not rocket surgery or brain science.

I like that specific positioning advice. Here is the other specifics for this simple operation:
-use a small hand drill, not a power drill.
-put tape or a rubber band on the bit to mark exactly how deep you want to drill.
-the pilot hole should be about 80-90% of the shank diameter of the screw.
-soap the thread of the screw, and as with the hole-drilling, use a hand screwdriver, not a power one.
-If the screw is really resistant to turning, DON'T force it. Carefully back it out and drill out the hole with the next size up of bit (preferably 1/64th increments, 1/32 at most)

As with all such operations, its best to do a practice run on an equivalent piece of wood that is not part of your instrument!