Where's the best spot for your strap button? - StewMac
Installing Strap Buttons - YouTube
When an acoustic guitar does not have a strap button on the heel of the instrument is there any better way to attach them a shoulder strap to the guitar than to
Guitar Shop 101: How to Install Standard and Locking Strap Buttons - Premier Guitar
Strap Buttons
AT-1 Tan Acoustic Guitar Strap Button Headstock Adaptor – Walker & Williams