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In addition to taking pictures, I'll often mark connectors and their ports on the system board with a number using a Sharpie, especially when there are multiple connections that are identical. This way they don't get mixed up when reconnecting them.

When I have to disconnect WiFi and Bluetooth antenna cables from the module I'll mark one of the connectors and put a little dot next to the corresponding connection on the module. This way, when reconnecting them, I know which one connects to which.