Under-Dash Green Box

As early as 1985 and as late as 1987, the fuel injection wiring harness contains a separate plug with two rows of holes.  These fit into a green box that mounts to the bottom of the under-dash area with a 10 mm bolt that points up.

A kind person pointed out to me that this is the idle control module. I have enough of them to offer them for sale at $30 each.