The speakers are optimally connected to Powerlink outputs, but the 5500 doesn't have any.
In this particular case it is not a show stopper though, as the 5500 has volume controlled preamp outputs. You switch the speakers to "line" mode, connect them with long RCA cables to the "pre amp" connectors on the receiver, and you're done.
The drawbacks are that you lose the instant speaker switch on/off, they will stay on for a while after you turn the receiver off. As I recall the power amplifier of the 5500 will stay needlessly in the signal path as well.
The Powerlink connector is the same in both ends of the cable (8-pin DIN male).
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(I put my moderator hat on and deleted your other post with similar content to avoid two confusing threads)