The "eyes" all look similar, though the one that has the headphone-like plug on the end is either for a BeoMedia or a BeoSystem 1 variant. The eye that is used with an active kit, passive kit, or wireless kit, uses a DIN plug that looks like powerlink and has a timer, volume, and standby button on the black vertical strip over the actual IR receiver.
If you don't have one, a dealer can provide one for about $35 US. This comes with a 49' cable and eye.
There is scarcely anything in this world that some man cannot make a little worse and sell a little more cheaply. The person who buys on price alone is this man's lawful prey. - John Ruskin