Will fastback S

Has anyone done this on their KA? I couldnt find enough of the individual 10ohm, 10watt resistors so I took the route suggested by several performance shops= install a resistor box from a honda. I have already mounted it and ran the 4 injector wires (output) to the power side of the injectors. What is left is wiring the last wire (input). According to the person i bought it from, that input wire is supposed to go where the plug is that splits the single injector wire into 4. Anyone know where that is? If you have done it before, please share, i need to get my damn car running. By the way, the reason I am doing this is because I have top feed 50lb injectors which are low inpedance and the stock injectors are high impedance