I have a swiss X300 V12 (X305) and would love to have the sidemarkers active. In the front I have to wire them, because there is nothing wired. But in the trunk I found cables for each side, that I connected with the genuine side markers i took from a dismantled US model. But there is no power on these cables, for whatever reason. Before rewiring them - does anyone of you know if that can be activated somehow?