Hi All - I have a 2018 Speedmax CF 7.0 and have an issue with the cable guide on the top tube. I've previously had the rivnut for the bento box break free (likely due to corrosion) and have fixed that. However, I've had an issue with the rear brake cable arise over the weekend and when I started to pull things apart to re-cable I've found that the cable stop is stuck in the tope tube cable guide, and the bolt closest to the handle bar in the cable guide piece seems to be spinning freely.
I have a few questions that I am hoping someone can assist with:
1) Does the bolt closest to the handlebars (part 8 in the linked doc below) in the top tube cable guide attach the cable guide to the frame by screwing into a rivnet in the frame?
2) Is this bolt necessary given the downwards force on the guide created by the gear and rear brake cables as well as the bento box being attached to it (i.e. is it worth worrying about trying to fix the issue with the bolt closest to the handlebars)?
3) With bolt 8 and cables removed, does the guide piece pop of from the frame relatively easily?
Any help would be much appreciated!

R41-18_BOM_ts (canyon.com)