Xbox one controller without headset connection?

Moin, I ordered a new xbox controller, where it arrived and I unpacked it, I found that it has no headset connection, why is that? And what can I do

Send back

Buy n adapter, or a 2.5 mm headphone cable

There are such models. Since probably not 14 days have passed you only have to send it back or buy an adapter. But if you buy a new one, the best thing to do is look at the pictures