You are buying an ISO standard radio connection lead.
The upper connector is for the speakers and is fully populated with all 8 connections used.(i.e. 4 speakers, two wires each)
The lower connector is the power supply to the radio and has five connections, permanent 12v feed, ignition 12v feed, negative feed, lighting feed and electric aerial output.
Each cable is 125mm in length and is clearly marked enabling a quick and easy connection