I have both footwell lamps and they are both that second PN you have - 68395784AA. It is a black connector with 2 wires - yellow w/purple stripe, and black.
The driver's side footwell light connector comes off the instrument panel harness (dash harness) right beside where the connectors for the VSIM and OBD port come off (see picture below - blue is where the footwell light wiring splits off, green is the OBD port, red is the VSIM connector). It is only about 6" long after splitting from the main harness leg, so it wouldn't be taped very far away.
The passenger side one comes off the IP harness right behind the lowest metal bar you can see when you remove the right side dash panel (see picture), right behind the metal bar. It's a bit longer so it may be taped up further and less obvious.
Also worth checking your IP harness part number to narrow down if you should even expect to see it (on mine, the tag with the IP harness PN is right behind the left bolt hole for the main driver's side footwell panel that has the OBD port and hood release - see picture below). Mine is 68411706AC and has both footwell lights.
The connector for the lower glovebox light comes off the main IP harness loom right behind the metal bracket that is exposed when you remove the panel on the right side of the dash (see picture - red is where the wiring comes off the main loom, blue is the light and connector). Lower glovebox light is on with truck door open. The one for the upper glovebox light has a door switch so that it turns on only when the glovebox door is opened (see pictures, one with door closed and one with door opened). Can't see the actual light and connector without taking more apart.