plechem

Hi all, I've seen this question mentioned in another thread, but no real answer yet... I've bought a Stagg EDB from a mate, and it's got a single strap button at the base of the neck. My mate had never noticed it before! Can anyone tell me how to actually use this to attach a strap? Both end of a single strap to the same button like on a sax? Or one end of a strap to the button and tie the other end to the top of the neck like on a classical acoustic? (Can't see how this would help...) Any advice gratefully received! -Phil