A cable interface system (20) for connecting internal cabling of a wind power facility (10), the cable interface system (20) comprising: a tower interface (32) associated with a tower (14) of the wind power facility (10), the tower interface comprising a support structure (80, 90) that is arranged to support a set of tower cables (36) in a fixed configuration; a nacelle interface (30) associated with a nacelle (18) of the wind power facility (10), the nacelle interface comprising a support structure (40) that is arranged to support a set of nacelle cables (34) in a fixed configuration; wherein the tower interface (32) is dockable with the nacelle interface (30) so that each tower cable (36) generally aligns with and can be joined to a corresponding nacelle cable (34).