That grommet is much larger than the original, requiring a larger hole. You might want to re-think that one. Location- you found the three "dimples" and will use the lower one? Two purple wires from wiper motor connector goes down the belhousing (with a clip on upper bolt to retain) to 4sp (two more retaining clips). Inside the car they enter the main loom, I will have to investigate more. All wires to the rear are connected at left kick pad. Tach wiring- grey wire (two piece) goes from tach to the coil. For power, a blue wire goes from fuse block to tach. The fuse block- most A bodies have no accessories so there is a missing fuse, a blank space. A tach is an accessory, so you will need to add the proper clips to add another fuse and connect your blue wire to it. You caught me at a good time, I just got done with this. Good luck. Oops, I just saw that yours is an A/C car. You should have no missing fuses.
