I'm transiting in Kuala Lumpur (KUL), Malaysia, and my next connecting flight is until the next day?

So MH (Malaysian), airline is offering me free accommodation at Pan Pacific air port hotel. I'll be reaching to KUL on 4th evening around 22:55 and and my next connecting flight is on 5th night evening at around 20:00 hours. I know that their hotel's check out time is 12:00 PM. I was wondering, will they allow me to stay longer until my next flight AFTER 12:00 PM or do I need to check out at that time by latest? Will they charge if I do? Sorry about the question, but I really need to know. Thanks.