Your good question turned into a heck of an argument that is totally unrelated to your Sky Raider.

CGR's note (and drawing) does not apply to what you're doing with the Sky Raider. His comment is for cases where you have a connector that is inside the structure of the wing or fuselage and is never intended to be disconnected.

You will be plugging and unplugging the connector each time you go to the field. If you want to tie a string around it every time that's fine but I do not think it is necessary.