The position of the fingerprint scanner flex cable is slightly underneath the power button, very close to the edge of the phone, be careful not to slice or otherwise damage it while removing the adhesive. The good news is that if you do slice it, your power button will still function, and it is relatively easy to replace.

No, not if the replacement battery is the original model (BN57). Do note that this guide links to the incorrect battery model (BM57) which will neither fit nor function with Poco X3 Pro

The correct battery model for Pocophone X3 Pro is BN57 whereas this guide links to BM57, the battery for Redmi Note 10 Pro. This battery does not have the same cable arrangement and will not fit inside Poco X3 Pro, how the heck has this gone unnoticed for nearly a whole year (how long this guide has been up)?

I don't know whose part this mistake is on, but I just realized that the battery this article links to does not fit Pocophone X3 Pro. Sadly, I realized this after ordering the battery and opening my phone up. Someone please address this.