An optical adaptor for mounting to a receptacle to optically couple connectorized optical cables, comprising: - an optical interface to provide a passageway for inserting a ferrule of a first optical connector terminating a first one of the connectorized optical cables and a ferrule of a second optical connector terminating a second one of the connectorized optical cables to optically couple the first and the second connectorized optical cable (1, 2), - a mounting element being mountable to the receptacle to hold the optical adaptor, the mounting element being configured to receive the optical interface, - wherein the mounting element is configured to mechanically couple the first optical connector to the mounting element so that the ferrule of the first optical connector intrudes in the passageway of the optical interface at a first side (S100a) of the optical interface, - wherein the optical interface has a second side (S100b) to mechanically couple the second optical connector to the optical interface such that the ferrule of the second optical connector intrudes in the passageway of the optical interface, - wherein the optical interface is configured to be insertable to the receptacle and to secure the mounting element to the receptacle in a first position of the optical interface inside the receptacle and to release the mounting element from the receptacle in a second position of the optical interface inside the receptacle, - wherein the mounting element is configured to mount the first optical connector at the mounting element in a first state at which the optical interface is moved in the receptacle to the first position and to mount the first optical connector at the mounting element in a second state at which the optical interface is moved in the receptacle to the second position. - an optical interface to provide a passageway for inserting a ferrule of a first optical connector terminating a first one of the connectorized optical cables and a ferrule of a second optical connector terminating a second one of the connectorized optical cables to optically couple the first and the second connectorized optical cable (1, 2), - a mounting element being mountable to the receptacle to hold the optical adaptor, the mounting element being configured to receive the optical interface, - wherein the mounting element is configured to mechanically couple the first optical connector to the mounting element so that the ferrule of the first optical connector intrudes in the passageway of the optical interface at a first side (S100a) of the optical interface, - wherein the optical interface has a second side (S100b) to mechanically couple the second optical connector to the optical interface such that the ferrule of the second optical connector intrudes in the passageway of the optical interface, - wherein the optical interface is configured to be insertable to the receptacle and to secure the mounting element to the receptacle in a first position of the optical interface inside the receptacle and to release the mounting element from the receptacle in a second position of the optical interface inside the receptacle, - wherein the mounting element is configured to mount the first optical connector at the mounting element in a first state at which the optical interface is moved in the receptacle to the first position and to mount the first optical connector at the mounting element in a second state at which the optical interface is moved in the receptacle to the second position.