A connector assembly with foldable card guides that, when folded, completely cover the array of electrical connectors resident on the connector housing. The connector assembly is shown in the context of a testing unit for automated test equipment. The folding feature is helpful when the connector assembly is not being used inasmuch as the card guides provide environmental protection (i.e. prevent the collection of dirt and/or particulate matter) for the electrical contacts resident in the connector housing. The foldable card guides incorporate spring-loaded bullet pins and radial locators at the points where they are pivotally attached to the connector housing, thereby allowing them to be locked in either an open or closed position. The foldable design saves space, affords protection, decreases the chance of inadvertent injury to personnel, and secures the testing unit for shipment. When the card guides are locked in the open position, they direct an electronic device subject to testing (e.g. an RF converter) into and out of the testing unit.
