I'm not using a shimano groupset I'm trying to install a sensah srx groupset that my girlfriend was using in her old bike but I'm struggling to route the cables through the stem-frame hole without kink them.
I was recommended to use jagwire compression less outer cables but they are really stiff and when I clamped the stem to the steerer they kinked. So far I trimmed a fair bit of the top spacer of steerer and it improved a lot but unfortunately the outer cables are already kinked.
On the other hand I had a set of cheap Clarks outer cables and they look quite more flexible, this weekend I will try to swap the outer cables for the more flexibles and see how they work.
I attached some pictures as how the cables were routed after the first time I trimmed the steerer spacer and some pictures of how it is now after I removed more material.
