Chapter 3 Law Alt route?

[Ａｎｏｎｅｍｅｓｉｓ]

How do I go the alternate route during the chapter 3 law route "Deceiver and deceived"

https://ibb.co/5xjXqgQC

[Pickleton]

You'll have to pop back to the anchor point right after the fight at The Burning Massif, redo the fight at Rhime and then go to whichever of the two maps you didn't pick last go around.