"It will be difficult to handle for the time being," Tech points out as he pulls a small, slim canteen from his belt pouch, twisting it open to carefully offer to Vader.

"You need medical assistance. I will inform the rebels that you have a claim on the dragon, and I do not think anyone will deny you that." They've seen what he can do, and he's taken a great risk to take the creature down. First choice to the spoils would rightfully be his.