[66SSchevelle396]

Guys, I am installing a american auto wire wiring harness and I am wondering do I need to keep the round hole that had a rubber grommet in it(to the right of the square connection on the firewall). I am not sure as to what wire ran through this(someone else disassembled car). If anyone could offer up any assistance. I am shaving the entire firewall and if I can get rid of it I am going to seal it up. Or if I need to keep it, does anyone know what wires went through it? Thanks in advance for any post

 

[Bryan59EC]

That hole is for the original wiper harness.
IF you are using stock wiring harnessess----you will need that hole for the wiper harness.

IF you are using the "Classic Update" kit----that hole will not be used and can be plugged.

You can get a plug from a 67 A-body car as it was not used after 66.

I made some modifications to my Classic Update kit and opted to use that hole for a factory type wiper harness.

But now my Update kits has wiring pigtails for a cruise control at a later date