The male connector (10) comprises a first connector body (14) comprising electrical contacts (54, 56) extending towards the free insertion end (44) of the first connector body (14) and provided with free end portions (58) that are elastically deformable. The first connector body (14) comprises a plug portion (18) extending in the insertion direction and being provided with first hook-like extensions (46) at its free ends extending laterally outward. The hook-like extensions (46) cover the free end portions (58) of the electrical contacts (54, 56) of the first connector body (14) which are elastically biased outwardly to engage the first hook-like extensions (46). Moreover, the female connector (12) comprises a second connector body (16) with electric contacts (98, 100) extending towards the insertion end and being provided with free end portions (104) which are elastically deformable. The second connector body (16) comprises a socket portion (72) enclosing the electrical contacts (98, 100) and comprising the insertion opening, the edge (90) defining this opening being provided with further hook-like extensions (92) extending radially inward.