If you pull off the top and bottom cowl grille (air intake between the windshield and hood) ... there's a fantastic spot to penetrate through a huge factory grommet with tons of space. Just make your hole, run wire, and silicone up. It's a nice low-risk spot because the cowling directs water away from there to begin with. You'll need a 2-jaw gear puller (4") to yank off the wipers and I'd recommend pulling out the wiper motor assembly to avoid some bloody knuckles. The gear puller is cheap online or can be borrowed from most car parts places. An hour of taking apart and putting back together was worth it for me not to have to drill into the unknown.
First photo credit goes to
@rohmers - he suggested this approach to me.
After pulling your wire, you can pop a hole or two in the sheet metal the cowl mounts to, add grommets and run your wire: