An operating room cable assembly for an electrical stimulation system that includes a lead connector having a housing, a lead lumen extending inwardly from a first opening in the housing and configured and arranged to receive a portion of a lead or lead extension, and a contact assembly disposed within the housing and configured and arranged to move relative to the housing. The contact assembly is configured and arranged to move to a load position and is biased to return to a lock position. The contact assembly includes of contacts that are configured and arranged to engage a portion of any lead or lead extension within the lead lumen when the contact assembly is in the lock position and to disengage from the portion of the lead or lead extension within the lead lumen when the contact assembly is in the load position.