Connection system for protected compound of lines

Connection system (1) for the preparation of a protected compound, including a cable (11) having a first coupling element (10) and a protective housing (30) having the following features: a) the protective casing (30) closed or a (around the cable 11) closable cable outlet (32); b) the protective casing (30) is connected (with a complementary housing 40) having a (for the first coupling member 10) surrounds compatible second coupling element (20); c) the first coupling element (10) is freely movable in the protective housing (30), characterized, that the cable outlet (32) can be reversibly brought into a released state in which the cable (11) in the axial direction freely movable through the cable outlet and in which it allows the implementation of the first coupling element (10).