and 50 the lead connector receptacles 42 also connect with corresponding connector blocks 48 and 50 through internal passages not shown in a well known manner as shown in fig3 the pre formed flex conductor system or harness 51 is provided with leads or conductors represented by even reference characters 52 through 66 configured to fit into the corresponding recessed channels 44 46 and to have corresponding free ends designed to attach to corresponding connector block as at 48 or 50 or otherwise not shown each flexible connector further having a second end fixed in spaced relation along a removable common member 68 provided for production of the harness and ease of assembly onto the primary molded module 40 fig4 depicts the molded module 40 of fig2 and 3 with the flexible conductors which may be constructed of a conducting foil or the like situated in place in the corresponding relevant receiving channels 44 46 the material of the flexible conductors 52 66 is one easily deformed to fit the relevant recessed channel 44 46 yet is sufficiently rugged to withstand the manufacture assembly and a subsequent over molding operation while remaining intact the material conductive of the traces or harness is preferably a stainless steel but other bio compatible materials which adapt themselves to the manufacturing and assembly steps satisfactorily in accordance with the invention may be used fig5 a and 5b illustrate the pre molded or primary molded header modules 40 of fig2 4 after application and routing of the conductive traces in the channels 44.