Basically, you connect them the same way you removed them. Either with adapter cables or by soldering directly. If you are using the original indicators, you will also need the appropriate indicator holders for the original indicators: www.ibex-parts.de/Article?s=10002488
Passen die originalen Blinker an die Halterung?
Für die Originalblinker benötigst du noch passende Blinkerhalter (Den Link dazu findest du in der Videobeschreibung)
And how to install lighters
Basically, you connect them the same way you removed them. Either with adapter cables or by soldering directly. If you are using the original indicators, you will also need the appropriate indicator holders for the original indicators: www.ibex-parts.de/Article?s=10002488