Helper Sticker

[broncoman]

Saw a UP SD60m (3 window) in the 2100s that had a red sticker vertically that read HELPER. It was on the nose on the engineers side. Has anyone seen this before and know what it means? I am assuming that it is equipped for radio controlled helper service but was curious if there is more to the story, or if this assumption is even correct.

Thanks in advance!

[UPTRAIN]

never heard of that........hmmm