I was thinkin' a single eyelet "thingy" screwed in the middle of the bottom of the door. Rope attaches and runs to a pulley attached to the outermost "roof" cross member (or 2nd one), and the rope cane either dangle straight down (when door is closed) or be tied off to one side. Whe the door is open, the dangling rope will be much longer, and can either hang by the side of the door and be secured/tied off....
A picture will cost ya
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