Drilling holes for L-track on the back of a hawk

[Adventurebound]

Hello FWC fam. I am wanting to mount some L-track on the back of my Hawk to hold a trasharoo.
Before I commit thought I would confer with the group. I have found a photo of a frame off the googs and it looks like there are a couple of vertical channels/studs. Based of my best guess, and some measurements from the photo I found I think I have found those? Any suggestions?

 

[Flemster]

This may be a silly question but thinking on the fly, will a stud finder locate the studs under the aluminum?

 

[Wallowa]

frame is aluminum...

 

[Adventurebound]

On the stud finder....Not a silly question, yes it does kind of. I used a stud finder to locate the support beams when I mounted my rails on the roof. I tried it on the back and got mixed results.

 

[Thevulture]

I mounted a fuel can on the back of mine. I unscrewed the wall on the inside of my Eagle and measured out where the aluminum frame was, to me that was the only way I could be 100% sure. It wasn't difficult, but just took some extra time.