I really wasn't feeling good about the spacer I made last work session. I decided to invert the angle F-864E (my version) in order to reduce the angle that is needed to canter the cables the right amount. The cables need to tilt forward a little for the cables to transition from the throttle quad to through the gear towers and then through the firewall.
By inverting the angle I was able to make a thinner angle to tilt the bracket. I made the wedge and it looks like it will work, but I have to modify it a bit more during the next session.