Connection + floorlight Lancia Musa/Fiat Idea

Hello dear Lancia/Fiat community, for dimming my LED daytime running lights at the Lancia Musa I have to connect to + the stand light, which is hardly feasible due to the sheathing and centimeter-accurate length of the wire harness. Who can tell me the color of the + core for the stand light in this wire harness or what possibility can I possibly tap in the interior the supply line to the stand light. Thanks for the help Fiatede