If he has an appropriate hide on each end of the tub, I wouldn't be too worried about disturbing him. He should be inside his hides once he finds them.

Is it the open sided rack? If so, you could cover the side facing your desk with a towel, might help a little?

I'm sure he'll calm down eventually, probably still just spooked from the trip. Just try and leave them alone until they've fed for you a few times, aside from maintenance (water changes, poop scooping, etc).

Congrats on your new babies! Can't wait to see them