Thank you for your replies!

Are the breakers 120v or 240v? (are the breakers single or double?)

The breakers are not connected to each other. They are 30Amp each.

In general, older houses will often have 3 wires for 240v; 2 hots and a
ground.

Both of the cables are 10/2

The cables are coming from different places, and I am not sure but I
think on of them is coming from the dishwasher. I am truly confused!