do not purchase an orange box. On the pentastar ECU connector the blue/yellow goes to switched 12V which is the blue ign1 (run) lead that T's to the upstream end of the ballast resistor & to one of the OE field terminals at the alt. the black/yellow goes to the coil neg primary terminal. the red/green is unused unless you are using a 5 pin ECU with a functioning 5th pin which is only applicable on OE 5 pinners (parts house 5 pinners have a dummy 5th pin, if it ohms infinity then it is a dummy & no need to use the red/green pigtail). the other 2 wires go to the dist zig zag pull apart connector (I forget which is which/see archives). How many terminals does the denso alt have? I ain't up on it but others are.