That's for the 4.6; the SC has a pigtail off the motor too.
You could get a automotive connector set that has the rubber seal, it just won't look the same and you wil need to do some wire cutting and soldering to replace the OEM ones. Just a thought.I'm all for even using an aftermarket weather tight connector.
You could ask over at SCCoA, you'll be wasting your time at the other place.I could ask over at TSTSNBN or other sites that someone has a scrap 89-93 SC or similar that uses the extra connector.
Hence the question about Metri or Deutsh.Those connectors always get brittle and crack. Unless you have one laying around, I would suggest either just using weather-tight spade connectors, or go to a junkyard and find any 3-pin connectors with heavy enough gauge wire to use and splice it in.