Hi
No you have it totally correct. The SATA2 ports are the best ones on your motherboard especaillly for the SSD. They will pass the TRIM commands on to the drive to keep it healthy and if you set the port's controller, the Intel ICH10R (southbridge), to AHCI mode you will get the best speed out of your drives.
It is a good idea to put your optical drive on another controller's port though as sometimes it can lead to problems.