Mounting the Handlebar End Mount

Each Handlebar End Mount requires the Firefly light inserted into a Universal Mount (included with every Firefly)

Using the screws and Allen key provided in the box, attach the Universal Mount to the Handlebar End Mount first.
There is a rubber foot integrated with every Handlebar End Mount designed to allow you to rest/lean your bike against a wall. Before tightening the embedded screw in the mount, ensure that the rubber foot is facing outwards.
Then, insert the end of the mount into the tube of the handlebar. Push the mount in gently as far as possible to secure a tight fit.
Secure the mount by tightening the embedded screw.

Here's a video outlining the steps above: