A connection assembly connects at least two subsea cables to a dual output subsea sensor An embodiment includes an adapter piece mounted to a rear part of the subsea sensor; a sensor port in the adapter piece, through which at least a first sensor connection and a second sensor connection are led to the subsea sensor; a first and second port for respectively providing a connection to a first and second subsea cable; a first penetrator providing a liquid tight seal between an interior space of the adapter piece and a duct connected to the first port; and a second penetrator providing a liquid tight seal between the interior space of the adapter piece and a duct connected to the second port. The sealing provided by the first and second penetrator preventing fluid communication between the respective duct connected to the first and second port, through the adapter piece.