Issue Here With Distributor Harness

[tonemj]

So I was reading up on changing out a distributor on a 2.5 and it says to remove factory plug harness from PCM that plugs into the distributor and a connector located by the coil. Ünder my coil there is an empty plug socket whereas there are 2 other connectors that are plugged in right next to this empty socket. Then off my distributior I have a 3 wire connector plug hanging off not connected to anything. This thing runs good. A bit rough at idle but runs and drives fine. Now how is this so? Without timing input from the PCM on the distributor? This connector won't reach to where that empty socket is or even fit for all I know but this thing has so many random unplugged wires around the engine bay I think the previous owner did a bad engine swap. By the way i have a 86' mj custom 2.5 5 speed and am mainly asking where this plug goes that's hanging off my distributor?