An electrical connector, comprising: a first connecting part and a second connecting part having respective front sides (17, 27) adapted to mechanically couple together in a coupling state, wherein the first connecting part has a coupling cavity adapted to receive a coupling element of the second connecting part; and a coupling bolt adapted to be tightened in a threaded through-hole provided over the coupling cavity of the first connecting part and to clamp the coupling element inside the coupling cavity, thereby fixating the first and the second connecting parts (10, 20) in the coupling state; wherein the coupling cavity is provided with a frontal opening at the front side of the first connecting part for receiving the coupling element, and wherein the coupling element is a protrusion provided on the front side of the second connecting part and extending along a central axis (CC') of the second connecting part, said protrusion having a shape profile with cylindrical symmetry about said central axis (CC'); characterized in that the coupling cavity includes a lateral opening at a lateral side of the first connecting part that is orthogonal to the front side of the first connecting part, the lateral opening being adapted to receive the coupling element when the second connecting part (10, 20) abuts the first connecting part from the lateral side of the first connecting part; wherein the protrusion has a circular, dovetail profile that defines an annular groove of inclined edges which runs around the perimeter of the protrusion; and a tip of the coupling bolt has a conical shape adapted to substantially match the dovetail profile of the coupling element at the area of contact with the coupling element so as to push the coupling element into the coupling cavity when the coupling bolt is tightened against the coupling element and maximize the contact pressure exerted on the coupling element. a first connecting part and a second connecting part having respective front sides (17, 27) adapted to mechanically couple together in a coupling state, wherein the first connecting part has a coupling cavity adapted to receive a coupling element of the second connecting part; and a coupling bolt adapted to be tightened in a threaded through-hole provided over the coupling cavity of the first connecting part and to clamp the coupling element inside the coupling cavity, thereby fixating the first and the second connecting parts (10, 20) in the coupling state; wherein the coupling cavity is provided with a frontal opening at the front side of the first connecting part for receiving the coupling element, and wherein the coupling element is a protrusion provided on the front side of the second connecting part and extending along a central axis (CC') of the second connecting part, said protrusion having a shape profile with cylindrical symmetry about said central axis (CC'); characterized in that the coupling cavity includes a lateral opening at a lateral side of the first connecting part that is orthogonal to the front side of the first connecting part, the lateral opening being adapted to receive the coupling element when the second connecting part (10, 20) abuts the first connecting part from the lateral side of the first connecting part; wherein the protrusion has a circular, dovetail profile that defines an annular groove of inclined edges which runs around the perimeter of the protrusion; and a tip of the coupling bolt has a conical shape adapted to substantially match the dovetail profile of the coupling element at the area of contact with the coupling element so as to push the coupling element into the coupling cavity when the coupling bolt is tightened against the coupling element and maximize the contact pressure exerted on the coupling element.