Answer to: Optical drive connection and second drive configurationBoth ports are capable of 6 gigabit SATA3 speeds. Go to: Apple menu / About this Mac / more info / system report / serial-ATA. Each SATA port will be listed. "Link Speed" shows capability of 6 gigabit speed. "Negotiated Link Speed" indicates the speed of your connection to your drive. This suggests that you can install your SSD in either location.