Chairs with Hubbell motors that have a heat/massage system are sort of rare, but there are still a few out there.  The connections on this control for the heat and massage are the ones most commonly used, but some older chairs will not plug in to these connectors. For those, you will have to “hard wire” your heat and the massage wires to the new control.  The main connector to the lift chair motor is a four prong connector like #4210.