Corner overflow "covers"...?

[CableGuy]

On this new tank I am setting up, there are like partial covers on the overflows. What the heck are they and what is their purpose?

[jimsflies]

Got a pic? Maybe allow for a durso or other plumbing to come up and over the top?

[larryandlaura]

They could be the ones that keep livestock out of the overflow.

[CableGuy]

They are on the front and almost goto the bottom... I will snap some photos.

[larryandlaura]

Thanks because the only other thing I can think of is maybe drainage.

[CableGuy]

They could be the ones that keep livestock out of the overflow.

After looking again this is what they might be... but the go almost ALL the way to the bottom... weird.... Pic coming soon...