Method for preparing a multicore cable, wherein the cable comprises at least a first core and a second core and an outer sheath which at least partially surrounds the first core and the second core, wherein an end portion of an inner conductor of the first core is electrically conductively connected to a first contact element and an end portion of an inner conductor of the second core is electrically conductively connected to a second contact element, wherein the method comprises: arranging the first contact element and the second contact element in a contact carrier having a contacting side and a cable side, wherein the contact carrier has a first longitudinal channel connecting the contacting side to the cable side, a second longitudinal channel connecting the contacting side to the cable side, a first passage opening crossing the first longitudinal channel and a second passage opening crossing the second longitudinal channel, wherein at least a portion of the first contact element is arranged in a front part of the first longitudinal channel, said front part extending between the contacting side and the first passage opening, and at least a portion of the second contact element is arranged in a front part of the second longitudinal channel, said front part extending between the contacting side and the second passage opening; fluid-tightly closing the first longitudinal channel and the first passage opening by insertion of two first sealing pieces (900a, 900b) into the first passage opening; fluid-tightly closing the second longitudinal channel and the second passage opening by insertion of two second sealing pieces (902a, 902b) into the second passage opening; and forming a connecting piece, which connects the contact carrier to the outer sheath of the cable, by overmoulding at least a rear portion of the contact carrier, said rear portion comprising the first passage opening and the second passage opening, and a portion of the cable, said portion projecting on the cable side, in an injection moulding method, characterized by the removal of the first sealing pieces (900a, 900b) and the second sealing pieces (902a, 902b) after the connecting piece has been formed. arranging the first contact element and the second contact element in a contact carrier having a contacting side and a cable side, wherein the contact carrier has a first longitudinal channel connecting the contacting side to the cable side, a second longitudinal channel connecting the contacting side to the cable side, a first passage opening crossing the first longitudinal channel and a second passage opening crossing the second longitudinal channel, wherein at least a portion of the first contact element is arranged in a front part of the first longitudinal channel, said front part extending between the contacting side and the first passage opening, and at least a portion of the second contact element is arranged in a front part of the second longitudinal channel, said front part extending between the contacting side and the second passage opening; fluid-tightly closing the first longitudinal channel and the first passage opening by insertion of two first sealing pieces (900a, 900b) into the first passage opening; fluid-tightly closing the second longitudinal channel and the second passage opening by insertion of two second sealing pieces (902a, 902b) into the second passage opening; and forming a connecting piece, which connects the contact carrier to the outer sheath of the cable, by overmoulding at least a rear portion of the contact carrier, said rear portion comprising the first passage opening and the second passage opening, and a portion of the cable, said portion projecting on the cable side, in an injection moulding method, characterized by the removal of the first sealing pieces (900a, 900b) and the second sealing pieces (902a, 902b) after the connecting piece has been formed.