imortor 2.0 battery pack integration

Hello iMortor community, I have a 2.0 e wheel since a few years now. I'm quite happy. However, sourcing a battery is difficult. The last one was obviously used as the original outlasted it. Since I moved to the country and need to go longer distances, I just bought a 20 Ah battery pack from the reputable company, UNITPACKPOWER. Originally, I was going to build a battery pack from the original in the wheel. So all of the batteries are out. The PCBs are intact. I would like to know, if I hook up the new pack directly into the wheel bypassing the electronics in the in wheel battery or if I connect it to the electronics in the in wheel battery? If so, where on the PCBs do I connect it to? I hope you understand. Thanks in advance. I can't wait to get out riding.