@gkelly The guy I borrowed these from showed me the invoice where he specified bananas at the amp end and spades at the speaker end. He must be the one in a million. And The Cable Company lets you specify terminations for each end of the cable according to amp and speaker sides. I agree it is a little unusual to specify spades for the speakers but you need to realize that every Wilson speaker made only takes spades so definitely not one in a million there.
The simple fact is where the terminations are doesn't say anything about what directionality the cables might have.