N64:Connector Pinouts

N64 A/V Connector Pinout
Main article:Nintendo Multi Out

Controller
Looking at the front of the console, pins are numbered left to right.

Cartridge
Looking at the top of the console with controller ports facing you. Pin 1 is lower left, pin 26 upper left.

Controller Accessory Port
When looking at the bottom of the controller with the tines facing down, Pin 1 is the lower left (latch side,) Pin 17 is the upper left (wire side.)