What’s the correct disc brake adapter I need to run 160mm rotors?

photo 1: my current frame (Bombtrack Beyond 1) , frame info on the website says rear brake is FM (flat mount) 140/160

photo 2: I will use Avid BB7 S-Road brakes (post-mount as far as I know, and I want to use 160mm rotors with it

I asked this question earlier with worse photos and less info , but someone recommended this adapter – is this the right one?

https://www.bike-discount.de/de/trp-fr2-fm/pm-adapter-160mm-hinten?number=20060744&__delivery=23&__currency=1

Thanks!