1- ring doorbell pro 2 and two mechanical chimes

I’m moving to a new home soon and they currently have a Ring Video Doorbell 2 installed. I picked up a Ring Pro 2 to upgrade this older model. Inside they have two mechanical chimes hooked up to one doorbell. I’m assuming they are piggybacked to each other, but it’s possibly that they’re both running directly to the doorbell also. Will one pro power kit installed do the trick or should I install one on each chime to be safe? I found some accessory kits on Amazon that say they include a pro power kit. So I can buy another if necessary. Also hoping I don’t need to switch out older chimes inside and they’re compatible.