How to use pre-existing bi-wire

I have done some research myself, but cannot get an answer that completely satisfies me.

Situation: Previous home owner left bi-wire in place for mains. My new mains do not support bi-wiring (single post set).

Since the amp end has two wires per spade, what should I do with the additional spades on the speaker end? electrically protect (tape, etc) and leave unused or attached to proper posts?

In case it is relevant, the cable is 9 gauge (Oval 9).

Thanks in Advance!

KD