Making a VEE should not describe what it looks like, per se...
My typical repair for something that cracks all the way through: I would use a roloc sander on a stress crack like that and sand down just over halfway through the thickness, with the width about 2 to 3 inches wide, or more. (Not the 1/8” or so that you show). The strength is going to come from spanning across the crack. Let the first layer set, sand down, add another, repeat until you are about flush with the surface. (Let cure between layers). Now flip it over, and do the same thing again from the back side, making sure you sand just over half way through (you should see your repair from the front) and add your mat to the back side, adding layers as needed, sanding down and repeating until that side is flush.
If the damage is not visible from the outside, I’d use the same procedure as laid out above on just the one side, but sand down more than halfway until you can almost see through the layer. Then make the repair adding layers as above. I fear with the minimal amount you VEE’d out the crack, the repair has limited strength, and the crack will reappear in short order. Those saddle bag covers take quite a bit of abuse in opening and closing. Needs a bit more thorough job in adding strength back in that area than what you’ve done, IMO. I’d hate to see you waste paint to a soon returning crack because the repair isn’t yet up to par.....