86Gen2Dream

I have a 1986 Mazda RX-7 with the 13b non-turbo motor. I bought the car with a bad motor. The old motor came out no problem. Except when I set the new motor in place the wiring on the passenger side of the car don't match up. I have 2 Brown with black striped wires coming out of the firewall and i don't have those colors on the motor side. On the motor side there is 2 Black wires that don't match up. If anyone knows what they are for please your help is needed.