Modular connector for electrical connections, provided with an external anchoring system which facilitates the grouping and fixing of several connectors through male and female couplings, both laterally and transversally. For first-sight recognition, the wraparound insulating carcasses (4) are standard color-keyed to identify the conductors. For the recognition of each circuit it is provided with an upper cover (6) which can be signaled by the user. The conductor part has a set of one or more metallic parts always of the same pole (1), and the set is built into a wraparound insulating carcass (5), having the same color as the conductor cable for this element.