Identifying bus bar rating for Square D QO load center

[dave68]

I am trying to determine the bus bar rating for a Square D QO load center. I cannot find the serial number on it, but the sticker on the side of the interior indicates that the main lugs kit number is QOL225. The main breaker is 200 Amp type QOM2. Would the main lug rating indicate at all what the bus bar rating is? I am not able to find a bus bar rating on any of the labels, where else would that be labeled or identified?

Thanks for any input!