Howdy ZATJ welcome to the forum.
Yep right cap.
Those are the fittings for an automatic transmission cooler. It's built internal into the radiator. Guessing you have a standard transmission, and somewhere along the line the radiator was replaced with a "fits all" type. If so it's not used.
But if you have an automatic trans, hopefully it has a separate cooler added somewhere as the cooler is a must for any kind of life for your transmission.
Keep a close eye on the leak, you have one. If you have the 4.0 engine, some were known to crack the head between #3 and #4 cylinders. This will cause a small leak that you won't see on the outside. Pop the cap off the valve cover and look for any type of milky looking oil.
Other then that, could be something as simple as a tiny leak on the outside that evaporates quickly. Had one like that. The solder joint on the top bracket of the radiator had cracked. Tiny amount of coolant would leak out, but evaporate from the heat of the radiator. Only found it when I saw a stain on the side of the radiator.
Pressure tested it and there it was. Wasn't a bad fix, cleaned off the spot, and resoldered it.
Best of luck!
97 Sahara, 74 Renegade, 72 CJ5, 55 Willy's (the Beast) Boss 302, 6:34 gearing, Bose 901 speakers.
God I miss that Jeep. Forgot the kinda Jeep, 80 SX4.