My new guitar is the same. No second button. I ordered one from Amazon and watched YouTube videos about how to install it. It's theoreticallly easy, but I haven't mustered up the nerve just yet to try it.

I did read that tying the strap to the headstock is a bad idea as it puts additional pressure on the neck, so maybe not something to do long term for either of us... so I gotta get up the nerve to drill a hole in my nice new guitar...