Rebuilding fender indicators - gotta cut new wires?

Sorry. I assume people can see the images in my head. :)

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Either end will not fit through the slot in the body of the housing... which I cannot find a good picture for. I did read where one supplier provides the bullet connector and shrink wrap separate so you can install the wire. I am guessing that is the answer. I just wanted to make sure I wasnt missing a magic solution.