Pro 16 PC16250 Storage

So I just got a couple of Pro 16 PC16250 with 256GB & wanting to upgrade to 1TB. It only has slot for a M.2 2230, not a M.2 2280. This is a change from the previous Latitude modes I'm use to. Not sure why because there is room for 2280. Guess I need to order different M.2 now. Oh well.