Access to switched power under hood

I have a 2024 Sequoia and need to tap into a switched power source under the hood. I’m guessing this is a common question but I searched and couldn’t find this in other threads.
The switched power is simply to trigger a relay in a Garmin Power Switch unit in the engine bay. I know there’s a fuse block under the hood but my meter indicated those were all tied to the battery directly and weren’t switched. I want to avoid going through the firewall if possible so I’m hoping someone might know of access to something under the hood that is powered constantly when the ignition is on.
Thanks!

 

A quick search and the seat heater f/l 15A fuse and the towing fuse 7.5A under the hood should work. Double check of course.

 

Perfect, worked great! Thank you!