How To Attach A PVC Pipe To The Camera Brackets And To The Metal Trusses

I know this is probably stupidly easy, but I just cant figure it out. I have these brackets.

I want to attach them to a PVC to drop a camera down a few feet. I'm hitting a mental block as to A) How to attach them to the PVC and B) How to attach the PVC to the metal trusses. I know I would use the long toggle bolts and go in between the metal but how do I attach that to the PVC pipe.

Thanks.

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