o2 sensor wiring for a 96

i bought a post cat o2 sensor and it was a universal one and it said connect each wire to the specific wire name but not colors what are the specific names for each wire i have 2 blacks a white and a blue on my car and the universal one has 2 whites a grey and a black what goes with what the new one says the black is the signal wires gray is ground and the whites are heat power and heat ground i'm guessing the 2 blacks on the original go with the 2 whites on the universal just not sure about how to connect the other 2... any help would be appriciated
Thanks!