What is this in the trunk?

I have a box in the trunk of my '72 XR7 convertible. The part number is worn but it looks like D2WD-13B314-AA. What is it - a sequencer? What are the other 4 little boxes attached? I’d attach a picture, but I don’t see how here. I’ve tried calling West Coast Cougar many times at different times to identify and order a new one, but they no longer answer any phone calls. I’m hoping you can help me know what to ask for. Thanks.

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If it looks like this, it is the Turn Signal Sequential Unit

Yes it is. Thank you!!!

I have the electronic sequencer in my 71. You remove the guts from the existing plastic box and pop in the new board.

I have one in my 70 and it works great after a decade of use! Like Hemikiller says, the board snaps right into the original plastic box, and plugs into the existing wiring harness for a factory look.