Urban Arrow Reflector Plug

Reflector Plug or Cap for Urban Arrow Cargo bikes,
To be plugged into the tube(s) in the front of the cargo bike, see picture below.

I had to grind/file a little bit away from the rips with a fine metal-fine, so that it fits the inner diameter of the tube perfectly.

Note: PLA might not be the best choice since the part is exposed to sunlight.
But I didnt mind and will see how long it will survive.