1. An apparatus comprising:a frame forming an interface device configured for connection to a test chassis; and
at least one interface connector coupled to the frame, the at least one interface connector corresponding to connectors of a unit under test, the interface device being configured for
insertion through one or more sealable apertures of an environmentally protective chassis that houses the test chassis, and
coupling to an interface device seating surface of the environmentally protective chassis without any intervening environmental interface or environmental interface plane located between the interface device seating surface and the test chassis;
wherein the frame forming the interface device includes a first end plate configured with electrical connectors and mechanical attachment members configured to align and attach a circuit card to the interface device.