Breaching the Firewall

I am about to run about a 1” plug through my son’s 2018 Tacoma firewall. Rather than experimenting, where is the best location on the driver’s side to either share a grommet or to place another one for this purpose? Your experience with this step may save me some trouble. Pictures are appreciated also.

 

https://www.tacomaworld.com/threads/help-me-get-through-the-blasted-firewall.71563/

https://www.tacomaworld.com/threads/places-to-route-wiring-in-through-firewall.250805/

https://www.tacomaworld.com/threads/wires-through-the-firewall-the-right-way.531829/page-2

A few reads

 

What are you running from where to where? 1” dia plug? Is that a big one.

 

SPod to harness connector.

 

Thank you
I appreciate your assistance!!