Matching inexpensive Zugehör ....

... Although this is accessories from China, but it is high quality processed and all connections fit. So you do not mess around to connect the camera mount to the harness with its original GoPro.
The headband is probably designed to be mounted on a helmet, because the settings are very generous. At the helm of the belt would certainly sit absolutely secure. We use the belt directly on the head, and as the camera can in extreme sports activities slip before.
But if one knows that one can deal with it.

Buy recommendation!