What does the Cycliq "Universal" Adaptor connect to?
The two circular holes will mount to a Go-Pro type mount. This is clever as the Go-Pro mount is available for a wide variety of surfaces include suction cups, helmet mounts, sticky mounts, handlebars, selfie poles and the like. 





Notice the adapter has two tabs and a hole.  That's a "downward" facing part, so its to go into a matching part with three tabs and the bolt/nut for retention.

Here's a gopro camera showing the two downward tabs in clear plastic:



So your adapter is intended to have the circle side facing upward, to mount the Cycliq light onto a gopro mount on the bike, not to mount a camera.