The strip emits the most light from one of the short sides, which I wanted to point towards the ground. The two wider sides of the lights look a little bit different.

I looked at both options and chose to have the side with a little stripe pointing outwards.

(Optional) Attach the battery pack with velcro

Use hot glue to attach one side of a piece of velcro to the battery pack and the other to the basket.

I used a longer piece on the basket, wrapping it around the tines and securing it with hot glue. 

Use zip ties to secure the lights, cables, and battery pack if necessary.