My hot-rodded Harley Benton has a switch on the back allowing it to be either 4 or 8 ohms.

My laney LC30 has the exact same option, and it's speaker is plugged in with a standard quarter inch jack.

Does this mean I'd be able to unplug the speaker from my Laney, plug it into my Harley Benton instead, and use the Laney as a cabinet?

If so, what ohms should I set both amps to?