The invention relates to a semi-finished product (134) for a cable guide system in a wind turbine component having a layer-like structure (135) with a carrier tape (136), a plurality of cable fastening elements (138) which are fixed in place distributed along the length (L) of the carrier tape (136), and a top layer (142) with a plurality of cutouts or incisions (144), wherein the cable fastening elements (138) are arranged between the top layer (142) and carrier tape (136) in such a way that each cable fastening element (138) at least in part projects out from the top layer (142) from a corresponding cutout or incision (144). The invention also relates to a wind turbine component, a wind turbine a wind turbine rotor blade and methods.