WHAT GOES HERE?

Dana67Dart said
Did some sleuthing....

View attachment 1716327494
Red is E Brake cable (not speedo cable)
Yellow is your hole
Green is the speedo cable

View attachment 1716327495

Red is E Brake cable
Yellow is a simple
Green is the hole for the speedo cable.

Yup, the yellow arrow. I've seen 2 firewalls with the hole in the exact same place and 2 with just the dimples. Just wondering what goes in the hole.