One should at installation already know what you're doing and maybe bring some soldering experience and the correct soldering equipment eg as a field; qid = 1423742649 & sr = 8-12 & keywords = 12 + v + l% C3% B6tkolben
When installed, works immediately.
Caution Before using a 35 watt or higher soldering iron I advise absolutely, because you wegschmorrt the flex cable including soldering. XD