Cat C15 + eaton 13, coolant leaking from transmission?

Long story short.

Hit a deer, coolant leak from a hole on the bottom of the rad. Managed to drive it to a truck stop as the last of the coolant was leaving the reservoir.
All the coolant leaked out through the rad, I ended up patching the hole with JB and refilled with distilled water, no water was leaking I thought I was in good shape.

Ran truck for about 10 minutes and shut it down. waited about 5 hours to cool. Topped coolant off again as I assumed it was getting air out of the block or something.
Noticed that the res was empty today, poured in about 2 gallons to bring it up to min line.

Now I have coolant leaking from the bottom of the transmission. Looks like its coming from inside the transmission?

I have the bunk cores and interior core valves turned off, they were off during the deer strike.

Now the leak is pretty fast, I need to get it 370 miles to my mechanic that was going to replace the rad. But I don't think I can drive it like this?

 

Wish I could find my 1/2" ratchet, only have my 3/8 and my adapter seems to have gone missing.

I suspect if I pulled that plug it would belch coolant though, I'm thinking the impact of the deer must have caused the tranny oil cooler to fail. I was seeing some nasty oil like stuff but I thought it was just the CAT ELC mixing with water. Now I suspect it was the transmission oil. Deer was centered and went under the truck so maybe it did more damage than I thought.

Guess I'm not going to get away without having it towed. I have zero experience with transmission coolers, much less one that appears to be internal.

 

Update, tranny full of coolant, everything points to a breached oil cooler and there must be a breather that it started leaking out of.