This link does a nice job of showing how to go about it:
diveriteexpress--how to attach a snap Quote: (Originally Posted by
davetheshoeman)

G'day All,
I have tried cable ties to attach a clip to the butt of the light, no luck. Does anyone have any suggestions for tying the clip to the base?
I spent two hours last night and a bottle of red and no luck, nice merlot! It is probably very simple but alas no luck.
Cheers
Dave