Is there a plug for this?

Is there a plug that goes here? Water would come through in a car wash. I have a tonneau cover but would like to plug this up.

TIA

 

Nope. Just go to Home Depot and get creative.

 

Dang. Was hoping for an easy quick fix.
is this where the bed rail get mounted onto? Dont have the rails on this truck.

 

Yes, that's where the rail mounts

 

Here take a look at this video... It's the OE rail setup and looks like that center hole does have a temp plug that holds it in place while the rail is bolted in...

I believe he shows the entire kit's part #, but it may also show part #s for just the hardware bag if that's an option as well

https://youtu.be/_IBWYPY8rcM?t=78

 

You can try plugging it with some black silicone (which can always be removed at a later time should you choose to use them).

 

^This

Lowes or Home Depot has these in the specialty drawers.
If it is too loose, slap some silicone on it and tape it with masking tape until it dries.
I did the same thing when I swapped my OEM bed lights for strip lights.