Soundbar for a E2011Hc Monitor?

Hi,

I need to purchase a soundbar for a Dell E2011Hc Monitor.

The question is, does this monitor accept a soundbar, and if so, which one?

On the back of the monitor, I think I see the supports for the soundbar (one on either side):

But when I look at the tech specs for the Dell soundbars, I don't see the E2011Hc monitor listed.

I see that all E series monitors manufactured after 2013 are supported. But this monitor was manufactured in June 2012.

So I'm confused - can I attach a Dell soundbar, and if so, which one?

Thanks.