yes that would be the way to bi-wire them. but you will not be bi-amping them because speaker a and speaker b is connected to the same amplifier in the receiver.
secondly, even bi-amping is pretty much useless.
I have a pair of BETA 50's, I tried bi-amping them with a 100w x 7 Rotel amp. No difference. what made the bigger difference was adding the amp in the first place (during loud playback). but the bi-amping, no.