Rep Power: 0

I bought a 99 civic half a b18c1 swap. The swap was half way done when I bought the car. Now that the car runs I have a code for crank fluctuation sensor no current. What connector goes to that sensor??? No connector will reach there or will fit. Also I have a code for both o2 sensor do I get them for the motor or the car. Sorry for sounding stupid this is my first honda and first engine swap