A base of an electrical connector includes a body and a front cover. An installation trough is formed on a first side surface of the body. The body further includes one or more first through holes communicating the installation trough and a second side surface of the body. One or more first positioning members are disposed on an inner wall of the installation trough. The front cover includes a front surface, a rear surface, and one or more second through holes communicating the front and the rear surfaces. One or more second positioning members are disposed on an outer wall of the front cover for combining with the first positioning member. The front cover is embedded into the installation trough with the rear surface facing the body, such that the second positioning member combines with the first positioning member, and the second through hole communicates the first through hole.