Electrical connection assembly comprising: - an electric cable comprising: • at least one central conductor (22, 22.1, 22.2); • an electrically insulating outer sheath surrounding the at least one central conductor; - an electrical connector comprising: • a housing; • an outer contact extending along at least one longitudinal axis, the outer contact being mounted in the housing; • at least one central contact extending at least along the longitudinal axis, the at least one central contact being mounted inside the outer contact with interposition of an electrically insulating body, the at least one central contact being provided with at least one segment that is crimped around the bared free end of the at least one central conductor of the cable; • an electrically conductive jacket surrounding, inside the housing, the at least one central contact and the outer contact at least over the length, along the axis X, of the segment that is crimped around the crimped free end of the at least one central conductor, thereby forming a cavity that is practically or fully closed; the assembly being characterized in that it additionally comprises: - a sealing and mechanical retention joint overmoulded both between the jacket and a portion (300 or 382) of the housing, between the housing portion (300 or 382) and a portion of the sheath of the cable, and around the housing portion (300 or 383) and the portion of the sheath of the cable. - an electric cable comprising: • at least one central conductor (22, 22.1, 22.2); • an electrically insulating outer sheath surrounding the at least one central conductor; • at least one central conductor (22, 22.1, 22.2); • an electrically insulating outer sheath surrounding the at least one central conductor; - an electrical connector comprising: • a housing; • an outer contact extending along at least one longitudinal axis, the outer contact being mounted in the housing; • at least one central contact extending at least along the longitudinal axis, the at least one central contact being mounted inside the outer contact with interposition of an electrically insulating body, the at least one central contact being provided with at least one segment that is crimped around the bared free end of the at least one central conductor of the cable; • an electrically conductive jacket surrounding, inside the housing, the at least one central contact and the outer contact at least over the length, along the axis X, of the segment that is crimped around the crimped free end of the at least one central conductor, thereby forming a cavity that is practically or fully closed; the assembly being characterized in that it additionally comprises: - a sealing and mechanical retention joint overmoulded both between the jacket and a portion (300 or 382) of the housing, between the housing portion (300 or 382) and a portion of the sheath of the cable, and around the housing portion (300 or 383) and the portion of the sheath of the cable. • a housing; • an outer contact extending along at least one longitudinal axis, the outer contact being mounted in the housing; • at least one central contact extending at least along the longitudinal axis, the at least one central contact being mounted inside the outer contact with interposition of an electrically insulating body, the at least one central contact being provided with at least one segment that is crimped around the bared free end of the at least one central conductor of the cable; • an electrically conductive jacket surrounding, inside the housing, the at least one central contact and the outer contact at least over the length, along the axis X, of the segment that is crimped around the crimped free end of the at least one central conductor, thereby forming a cavity that is practically or fully closed; the assembly being characterized in that it additionally comprises: - a sealing and mechanical retention joint overmoulded both between the jacket and a portion (300 or 382) of the housing, between the housing portion (300 or 382) and a portion of the sheath of the cable, and around the housing portion (300 or 383) and the portion of the sheath of the cable.