Wow, that was easy. Got home at the end of the day of errands and realized I still hadn't done intros this weekend so I took them both into a bathroom in their respective pouches. I gently set them both down in the dry tub (making sure the door was closed and the toilet lid was down!) with the pouches facing each other.
Judah worried me at first as his first reaction was to crab and retreat back into his pouch while Nala was looking on curiously. After several minutes of them just hiding from each other, I gently shook Judah from his pouch and removed it. He cautiously went over to Nala's pouch and when she didn't react, he crawled in, groomed her for a bit, then they cuddled up in the pouch together (swirling a little to find a good "together" position.
I put both pouches back in the main flight cage and removed one of Judah's wheels (left his favorite). I put Nala's favorite wheel and her foraging toy box in the main cage then buttoned it up.
Meanwhile, 2 more adoptees from TPG are off in the dining room going through quarantine. They just got here 2 Fridays ago so still have some time before I moved them into the cage next to the main flight cage. I don't know how that intro is going to go but at least I've got it to 2 pairs now.