I'm a little late on this discovery but I did see it a few days ago and renewed by vehicle registration yesterday. I was dreading the process in Jabriya, especially in this heat so I was happy to see this place. For women it's extremely easy, you walk in with your CID and registration and someone will take your documents to be processed while you sit in the small waiting are for females. He will come and ask for your number and the cash for the process, if you don't have cash there's an ATM close to the door which is very convenient.
Once the process is completed you will follow the guy to your car and leave out the back, so quick and easy!