The Op/tech pro loop system can be pushed through the strap lugs. You can not use the center part of the strap and clip the two short connectors together for a wrist strap when it makes sense. I actually cut away the neoprene center section and sew in a 3/4 inch nylon web strap for the center section to go around my neck or shoulder when that makes sense, but that is a personal call.
Other will recommend a variety of other options from almost free to, well, Leica-level conspicuous consumption. The Rollei original clips (and Chinese knock-offs) are nice because as you lift the camera, the strap falls away from the focus hood. The Pro Loop connector does a similar thing.