Mechanical?/ceiling door latch closet help!?

I’m looking to put a closet system in my closet and there are a couple small doors in the ceiling. I don’t even know how to describe it (as you can tell my the question title). It looks like they’ve been painted over long ago and I’m not even able to open without cracking the paint. I’m wondering when putting a... show more I’m looking to put a closet system in my closet and there are a couple small doors in the ceiling. I don’t even know how to describe it (as you can tell my the question title). It looks like they’ve been painted over long ago and I’m not even able to open without cracking the paint. I’m wondering when putting a shelving system if I need to leave room to access these and how much room would be needed between the top of the shelving unit.

Thanks!
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