tree for controlling and or powering the components located downhole the auxiliary passages 32 typically house connectors that passively wet mate with auxiliary port connectors located in the function spool 10 and may take any suitable form including vertical or horizontal connectors the ports 44 in the function spool 10 also include connectors and may also lead to a control unit located subsea or on the surface additionally although the tubing hanger 20 may interact with the horizontal tree 14 to align the radial angle of the tubing hanger 20 and thus the function mandrel 30 the connection of the function mandrel 30 to the production tubing 22 may be designed to allow a certain amount of function mandrel 30 vertical and rotational movement the ability of the function mandrel 30 to move allows for a certain amount of tolerance should the connectors not be perfectly aligned when the tubing hanger 20 is in the set position as an example the function spool 10 includes an auxiliary passage 32 for housing a hydraulic fluid line 36 that extends downhole to an scssv not shown the scssv controls the flow of fluid through the production tubing 22 from the producing zone the fluid line 36 extends from the scssv and into the function mandrel 30 and routes into a passive coupler 40 corresponding with the coupler 40 in the function mandrel 30 the function spool 10 includes a vertical coupler 42 that can extend from.