You can certainly bi-wire your Monitor Audios from the Sonata amp. Just remove the jumper, and run a 2nd set of wires off the same amp outputs...one set to the top, one set to the bottom. The benefit of this comes from creating separate circuit loads on each set of wire, which reduces intermodulation distortion.
You would need a 2nd amp to bi-amp them. The connections would depend on whether you’re bi-amping vertically with 2 identical amps (one amp per side), or bi-amping horizontally with 2 different amps (one amp for low frequency, one amp for highs). Lots of Google help to guide you on hook up.