An electrical connector includes an electrical terminal and a housing having a front end and a back end with an opening configured to receive the electrical terminal therethrough. The housing includes a first lock system configured to allow insertion of the electrical terminal into the housing and prohibit removal of the electrical terminal from the housing. The housing is configured such that the first lock system is accessible from the front of the housing to release the electrical terminal from the first lock system. A second lock system is configured for insertion into the housing to prohibit removal of the electrical terminal from the housing independently from the first lock system.