Heard about some people getting hassled for not having reflectors after their tail chop, so I did this using an old bicycle reflector and a cable tie:
Location:
I stuck it up through the gap sideways and rotated it back 90° to snap it in place, then secured it with a zip tie around the nub where the tool kit is normally strapped in.
From the inside:
LEO POV:
Your local bicycle shop should have some of these handy (simply unbolt it from the clamp):
