Code 3 ArrowStik mounting questions

[Cobra Jet]

Does anyone have any information as to how the Code 3 10-head ArrowStik was secured/mounted to the roof of the DPS units?

If anyone has any images from a restored unit with the Code 3 ArrowStik mounted, please share. I'm having a hard time finding info on this subject matter.

I have seen multiple images online of in-service period images with the ArrowStik on the roof next to the Jetsonic, but can't make out how that ArrowStik is actually secured/mounted.

Thanks in advance to anyone who can help.