Heater duct - holes on top

[OldSpool87]

Hi all,

I am in the midst of a heater backdate on my 1982 SC. I was able to install the left side heater duct in the engine bay with little trouble and sourced the part from our host. The heater duct is metal and has two holes at the top. These are not the holes for screws which affix the duct.

Any insight into their purpose and if they should be plugged or left alone?

Thanks

[75 911s]

Those are holes for the rubber tabs that come on a lot of spark plug wires

[OldSpool87]

Thanks. Right after I posted I started to think about ways to organize the plug wires. Go figure.