I have a The Loar LH-350 archtop, the guitar comes without strap locks installed, so every time I play I've had to do it sitting down, which I have nothing against, and it's actually really comfortable, but it's easier to look around towards my group when I'm playing if I'm standing up. It's also a bit less of a hassle, and sometimes I just like to play standing, or maybe I'll even have to sometime.
Anyways, the guitar has no strap locks. The cable input is where the right side (or outer side for those leftys

) strap button should be. I've used the guitar standing up a few times by cutting the strap hole a bit to make it wide enough to fit around the input hole which actually looks a lot like a strap button, but a bit wider. I tie the other end around my headstock, but playing this way is very uncomfortable for me. Anyways, I have a few strap buttons at home, a standard pair of strap buttons I took off a Jackson guitar and a pair of strap locks. I would probably use the standard ones since they're smaller. I probably only have to use one since I can still fit straps around my input.
But yeah, should I install a strap button? and where should I put it (the one closer to my fretting hand) I'm afraid I might cut a hole in the wrong place and mess up my guitar. I also don't want to open up a hole somewhere that could possibly alter my acoustic sound in any way, since I use it a lot.