Abstract: Multi-conductor strand wiring harnesses are connected together by a backshell having several internal semi-flexible circuit boards disposed therein. A minimal non-shielded conductor window is provided between the inlet and outlet connections in the backshell. The system allows interconnections between round and flat connector pin arrays. The use of multiple circuit boards in the backshell allows a multiplicity of inlet to outlet connections to be made, and also reduces the size and weight of the backshell assembly. Right angle connections are readily made in a minimal spatial envelope.