The only thing that should go into the sewer line is sewage.
The sewage has been verified as only going in one of the pipes.
Yes, they are likely stubbed off downspout connections. Need
to be gone.
Do you see it some other way?

Edwin Pawlowski wrote in message
...

"Michael Baugh" wrote in message
Likely stormwater drain connections.
Eliminate them. They need to be gone.

Don't you think it would be smart to find out what they are before
eliminating them? Just plugging them up is about the dumbest idea I've
heard in a while. All sorts of damage may occur if something is draining
into them, like downspouts.