Does this mount directly to the existing holes?

Yes — designed to use factory mounting points. You'll need basic hand tools and a socket set to remove the old unit and bolt this in.

Will I need to splice into the brake light wiring?

No. This assembly connects to the existing factory connector — no cutting or splicing required. Plug it in and you're done.

Can I return this if it doesn't fit?

Test-fit before finalizing installation. If there's an issue, contact support with photos of your setup — most fitment concerns can be resolved before you commit.