Ever do that with a nest of tree trimmer wires? I started taking phone pics of my rig's control box before unplugging anything... saves me from mixing up the ignition and winch leads every single time.
Save his butt once a month" really sells it short. I'd say it saves you from that special kind of panic where you're staring at a bird's nest of identical red wires, trying to remember which one goes where, and you just know the alarm will scream if you guess wrong. A photo is basically cheap insurance against creating your own little haunted house.