Q: What's the purpose of this part...?

[glennm01]

Possibly a dumb question...but in the pictures below, what is the horizontal bar thingie that's on the side of these two boxes towards the rear? I assume it's for mounting something, but I can't find any photos of trucks that show anything mounted to them.

 

[ITTOG]

May be to mount a tarp to have a cover to be under.

 

[deoc4114]

I'm going to second that based on this picture:

Sent from my SM-N950U using Tapatalk

 

[C p weinberger]

Based on boating “sail track”
Great solution to attach cloth like material to the side of something. Creates an almost water tight joint. For those looking for a light weight option or if you rarely use an awning this provides great option but you do need poles or attachment points/ tree. The best part is you can decide what track length and what size “sail” length you want
This is the opposite spectrum of a motorized awning

 

[glennm01]

Aha. Thank you!