Abstract: An adapter for connecting a wet Christmas tree to an eccentric adapter production base. The adapter includes a hydraulic connector, a guide bushing which comprises penetrators for actuation of a dual sealing valve, hydraulic and electric plates with command and monitoring functions of resident equipment, two slide AI valves which provide a testable barrier of an annulus, an ROV panel which commands hydraulic functions, a top interface which interacts with the wet Christmas tree, a bottom interface which interfaces and/or communicates with the eccentric adapter production base and with a tubing hanger, a flow line connector with an integrated flow line mandrel, and a locking system with a sealing lip arranged inside the bottom interface. The top interface has a top guide funnel-shaped structure. The bottom interface has a structure of a connector and the guide bushing comprising the penetrators. The locking system interfaces with the eccentric adapter production base.