WOW, I don’t agree with your husband at this time, not when he is so angry and is not showing respect. That is only a play for power and control and that will most likely backfire. Maybe the best way is NOT to try and control the situation by pushing the envelope. Maybe the best way is to say to him or write a note saying that you can’t control how you feel any more than he can and you worry about him when he is out with friends you don’t even know late into the night. Let him know that you are doing your best to respect his needs right now and that respect and consideration is mutual in a relationship. Then let him know that Tatty needs to lock up before he goes to sleep for the safety and security of the family. Let him know that you discussed lending your key to him with tatty to be returned to you when he comes in and you want to discuss that with him and see how he responds.
You can decide where he can leave it when he comes in as opposed to you looking for it or waiting for him to wake up to return it. It might not impact him right now but he might realize later that you worked together on a solution to a problem.
Hatzlocha