this is the type of hack that a) would be crazy to even try to brake cables b) might, maybe, if you are luck work for shifter cables.... If i were to have to macgyver some think, I would find very small cable crimps and I would not try to do in line, instead I would make would do 2 loops forgive the terrible graphics, but this should give you the idea cables looped in red, crimps in blue. Soldering cables has never been successful in my attempts