ditch light bracket (hole) for Midland "ghost" antenna?

I'm looking at the Midland MXT275 and the ghost antenna. I have ditch light brackets but cant find what size hole is needed to mount the antenna.
I ordered a set of ditch light extension brackets but they are too big for what I want.
Then I saw these and it's more of what I'm after: I'm not sure if I can use them as is or if I need to drill.

edit: looks like a 3/8" hole?

 

Sorry, figured it out. The Rago Fab one is what I want.
Now I gotta sell these skid plates.

 

Ordered the Rago Fab bracket.

 

Nice, made my own;



You'll want to understand RF and the risks of putting it this close to your head.
I Tx rarely, keep it at 5w and don't rag chew. I'm comfortable with it but others may not be.

 

When you say "head", do you mean the radio or the ditch light?
I'm looking at mounting the radio unit on the passenger kick panel, and the antenna inboard of the driver side ditch light.

 

Head as in your head. Rf energy on Transmit. Cooks soft tissue like eyes, You know how a microwave works?

 

It’s either there or the passenger side but the AM/FM antenna and soon a snorkel are there.

 

just keep the power down, and transmit/talk out to a minimum.

 

I also made my own mount, as I felt like the options on the market were too big. Here are my installs might give you some ideas.

Here is my install for the Radio
https://youtu.be/8K2gd-WbyzE

And for the antenna re route.
https://youtu.be/D7DotMlaXaQ