My enclosures are not typical. They won't help you. I go big or go home and I have a lot of horticultural and reptile experience, so what I do is a bit different than most keepers.
I will share photos however, because you asked.
If your roof is low and your can't raise the cage up, I suggest you orient the enclosure vertically, so that the cage becomes longer, rather than taller and you give him some higher space and more room to roam.
Veileds are very active and sun loving creatures. My veiled uses every inch of his enclosure, from top to bottom and my enclosure is likely 4 times larger than 98% of the keepers here. That's not to say that you need a cage that big, but I'm trying to get you to train your mind to understand and think like and animal that lives in the branches of trees and shrubs.
I see a dripper and a hand mister. You can't possibly commit to misting that chameleon for 5 mins or more 3x a day, every day. If you are, there is lots of water you need to account for or you'll have a wet carpet. That chameleon needs 3 mistings, minimum of 2-5 mins each, every day and it would be better to have a few 15 min mistings a few times a week. You aren't providing this on a carpeted floor, with no drainage.
Browse the stickied enclosure threads and you will see TONS of cages similar to yours, how they are raised up and how they are drained.
Most are adequate, some are awesome, a few make me sad for the chameleon.
You can go to Home Depot or Lowes, buy some lighting grid, some plastic cement mixing tubs, and a small plastic table and sit your horizontally oriented cage on the lighting grid, over the cement mixing bins, and that will collect the water. You may need some crates or boxes to get the cage up a bit higher. Remember, he should be able to look down on you.