Thanks for the comments guys.
The clips are made from 1mm sheet styrene. I pasted the printed door images on the styrene and cut the sheet. I then sandwiched a piece of styrene between two door panels at the top in the area above the level of the corridor.
I was going fr the Bladerunner feel. I wan a lot of cramped corridors filled with people. I want to play games where the civilians are terrain just as much as the corridors! The beauty of 15mm is that you can have a whole gaggle of civilians running around without breaking the bank or spending eternity painting.
I'm currently working on some modeled street furniture for the complex.