How do I disregard X / Y ?

I have a behavior plugin. (At least I think it is), it's called MoveTo.

This behavior allows you to move an object to an X/Y.

Unfortunately, there's no singular "Move to X" or "Move to Y", it's only "Move to X/Y"

I'm wondering if there's a specific command which will allow the Y value to stay as it is already?

Say for example, I want to move two objects to the same pixel height.

I could do 200, 0. But then it'd move both objects to X = 0, which isn't at all what I want. So, instead of writing '0', is there something I can write instead that says 'Don't worry about this one" ?

I hope I made sense. Sorry if I got X and Y mixed up lol.

Just Use Self.Y to leave Y alone.

Just Use Self.Y to leave Y alone.

Thank you very much