C|24 Stereo Speaker set up!

[seungkeeya]

Hi, I am new to the forum.
Always have been helped out tremendously by tips and insights that you guys are throwing. Didnt get to thank you until now!

I recently purchases a C|24 unit.
We as a start out sound/media company, wanted to utilize C24 as a main contol surface.
As I was learning as I go, I was encountered a very novice question.

When connecting stereo monitor speaker L and R to C24, using DB25 to XLRfem, XLRm coming out of my speakers to 1-3 of DB25, right?
For now we only use two monitor speakers, so if I buy a cable with 6 more XLRfem, I thought it might just stat there and not being used.

There are two Alt-Out line output so I attempt d to plug speakers directly into those, but I couldn’t get any sound, however I couldnt think of going into I/O in my PT and configure.

Long story short, if i were to connect two monitor speakers to main output of c24, buying a DB25 to XLRfem would be the best solution?

Many thanks in advance.
I have been searching for a long period, couldn’t seem to find the clear method..
Would appreciate it a lot!!