Abstract: Electrical connection terminal unit comprising a box (100; 1000) provided inside with a block (110; 1110) for housing at least one pair of electrical connectors (200; 1200) comprising at least one element (211, 212; 1211, 1212) for retaining the end of the wires (1a, 1b) of a cable (1) and at least one flat contact pin (211c, 212c; 1211c, 1212c) of the “fast-on” type, said block (110; 1110) comprising at least two seats (111, 112; 1211, 1212) of suitable depth in the vertical direction (Z-Z) suitable for housing said elements (211, 212; 1211, 1212) for retaining the wires (1a, 1b) of the cable (1) and extending perpendicularly towards the outside of the bottom (100b; 1100b) of the box (100; 1100) so as to form a housing (114; 1114) for the contact pins (211c, 212c; 1211c, 1212c), said retaining elements (211; 212) being of the spring type and arranged parallel to the bottom (101b; 1101b) of the box (100; 1100) of the terminal unit.