I have a new kelvinator 2 stage furnace and single stage outside air conditioner. I am trying to hook up a new ritetemp 6030 thermastat. The furnace board is labeled y/y2 y1 g w2 w1 c r. The thermastat is labeled c b o w2 w y y2 rh rc g a . The furnace instructions tell me to hook up the w1 to w1, w2 to w2,c to c, r to r and the y/y2 to the y. Which of the thermostat letters should these be connected to. Thanks