An electrical connector (2) housing (1) for connecting at least one cable lug (31) to a threaded terminal of an electrical device (4), including, for each lug, a hole (11) for receiving a screw (12) for retaining a lug in a threaded terminal, which hole has a lateral slot (13) designed to allow a lug to penetrate the hole, a lower opening (14) for connecting the lug to a threaded terminal and an upper opening (15) designed to allow the passage of a screwing tool for the screw, the size of the upper opening of the hole at its widest point being strictly less than the size of the hole at its widest point, said opening being designed so as to allow the passage of the screwing tool and having a section which is less than the section of a human finger.