It seems like only red ports are SATA3 on this motherboard, and orange is SATA2. Which means, you would need to connect SSD to red port. I would move DVD to orange slot (SATA2 has enough bandwidth) to make place for SSD.
where should I connect the SATA3 6gbs in my motherboard SATA slots?
Connect SSD to any of red sata ports. Those are SATA3.