I'm not Thibs but i now a little of IF (Intermittent Fasting) and ADF (Alternate Day fasting). I follow this approaches a long time with excellent results and that was my opinion.
Each ADF shall be followed for one day of super-plus or in the worst case of maintenance intake.
The Lats/Biceps is the high volume workout and its is the day that need more carbs and a possible cheat for mental sanity. Remember that in the Foundation training you will use a lot of eccentric less training that NOT diminish the super compensation of glycogen.
PS: You can start first 1 or 2 weeks with super-plus on Monday and Thursday, and after implement this. Remember if you start with an extremely aggressive approach the results will stop earlier.