An electrical connection unit, comprising: - a main body to be connected to a predetermined number of electric wires and/or cables; - electric-connection means formed in said main body and connectable to said electric wires and/or cables; - a connector not comprising an intermediate covering element and comprising: - a support base having a central portion and a perimeter portion circumscribing said central portion; and - electric poles associable with said electric-connection means and housed in said central portion; - hooking means reversibly connectable to said connector and being adapted to integrally withstand efforts and/or mechanical reactions resulting from connection to said connector without transferring mechanical actions onto the electric poles present on said connector; and - mechanical-connection means directly and integrally formed in said perimeter portion and adapted to receive in reversible engagement hooking means, said mechanical-connection means allowing reversible plugging of said electrical-connection unit to said electric poles and being adapted to integrally withstand efforts and/or mechanical reactions resulting from a connection of said electrical-connection unit without transferring mechanical actions onto the electric poles themselves, characterised in that it further comprises: - driving means operatively activated on the hooking means so that said hooking means is reversibly configured between an engagement condition, in which said means can be interfaced with the mechanical-connection means of the connector, and a disengagement condition, in which said means can be disengaged relative to said mechanical-connection means; and - a selective-lock body that can be operatively activated on said driving means to determine the engagement condition and/or the disengagement condition of the hooking means, said selective-lock body being slidable along the main body. - a main body to be connected to a predetermined number of electric wires and/or cables; - electric-connection means formed in said main body and connectable to said electric wires and/or cables; - a connector not comprising an intermediate covering element and comprising: - a support base having a central portion and a perimeter portion circumscribing said central portion; and - electric poles associable with said electric-connection means and housed in said central portion; - hooking means reversibly connectable to said connector and being adapted to integrally withstand efforts and/or mechanical reactions resulting from connection to said connector without transferring mechanical actions onto the electric poles present on said connector; and - mechanical-connection means directly and integrally formed in said perimeter portion and adapted to receive in reversible engagement hooking means, said mechanical-connection means allowing reversible plugging of said electrical-connection unit to said electric poles and being adapted to integrally withstand efforts and/or mechanical reactions resulting from a connection of said electrical-connection unit without transferring mechanical actions onto the electric poles themselves, characterised in that it further comprises: - driving means operatively activated on the hooking means so that said hooking means is reversibly configured between an engagement condition, in which said means can be interfaced with the mechanical-connection means of the connector, and a disengagement condition, in which said means can be disengaged relative to said mechanical-connection means; and - a selective-lock body that can be operatively activated on said driving means to determine the engagement condition and/or the disengagement condition of the hooking means, said selective-lock body being slidable along the main body. - driving means operatively activated on the hooking means so that said hooking means is reversibly configured between an engagement condition, in which said means can be interfaced with the mechanical-connection means of the connector, and a disengagement condition, in which said means can be disengaged relative to said mechanical-connection means; and - a selective-lock body that can be operatively activated on said driving means to determine the engagement condition and/or the disengagement condition of the hooking means, said selective-lock body being slidable along the main body.