Let's start by listing what cards you have and the slot order they are in.

Basically, in the main cabinet the first amphenol will be the 8 built in digital ports on the motherboard and the various moh, page and auxillary connections. P2 will be 8 pairs for each slot so slot 3 will start at pair 17 which yes y/o .If that is the first co card then by default that would be trunk 1 or 701 in the dialling plan. y/g would be trunk 2 or 702