Lack of clarity on my part here. If you attach both wires to the same output on the amplifier, you're correct of course. I was thinking of
@JktHifi's proposal, using one set of speaker outputs for each wire. Then, the sections of the speaker may look like different speakers to the amp.
As the total load would still be the same, it would depend on how the two outputs are set up: and you're probably already in difficulty with single wiring. And if there;'s just switches for the speaker pairs, still the same, as you say.