I recently purchased the HS210 kit to replace two switches that control exterior garage lights. Upon taking off the old switches I'm not sure what to do. I've tried several combinations with no success, the house is roughly 10 years old and has neutrals in each box. The first switch has a 3 way wire with red, black, ground and neutral. There is only a red and black attached to the old switch, besides the neutral and ground. The second switch has two black wires attached to an old 3 way switch, besides the ground and neutral as well. Basically I have three way switches with only 2 wires at each side. One combo is red/black while the second is black/black. I don't know how these match up with the new hs210 switches as they have spots for two travelers per switch.