There is a plastic tie, one H type support, two 2 studs flat supports, one double side tape, four screws.

The 2 studs flat support can be screwed to the H type support to form an assembly in which you can pass a plastic tie through.

The 2 studs flat support can also be screw to any flat surface.

In this picture, you can see that the H type support has been screwed to one of the two plastic 2 studs supports to form an assembly.

You can also see how to use a plastic tie to attach the system to anything.

This assembly will allow you to transfer your alarm from one item to another. 

These holes can be used to screw the back cover directly to the 2 bicycles accessory screws available on most bicycle tubing frame.