Need help on drilling holes in roof for LED MOUNT

Hello TW Im stumped on where to drill the hole to install my relentless fabrication led lightbar mount. I have the Access Cab model and they dont have the holes like the double cab. Please help

 

What I did on my first gen was put the brackets on the light then have someone help you hold it up while positioning it where you want it. After that you can mark it with a sharpie then go ahead and drill. Thats what I did anyways hope it works for you. Oh and dont forget to measure the distance of how far up the brackets are on each side before you drill !

 

Thanks for the advice I've been stumped for a week now.

 

remember, measure twice, drill once

 

Hey buddy! Didn't realize you were installing a light bar too. How did it turn out? My 50" radius bar will be here Friday. Interested in how those relentless mounts work out.