Yes!

Nothing else to identify. (except this: silicon optix epson hqv tx3)

This is the projector it is paired with. Loosely eludes to the processor in early pages.

[Link: files.support.epson.com]

I am going to try to experiment. Do you know if it matters if I have a 3.5 mm male jack that is stereo vs mono? Going to go from 12v out on Arcam to those trigger (? in vs out) on Epson processor with a stereo jack.

Update: tried above and no go!