I have been unable to ever find any for SAIC (Chinese) MG TF wiring diagrams, and have read reports of SAIC refusing requests for diagrams when asked.
RAVE manuals were a MG Rover issue and ended with MG Rover I think. (Rover Automated Viewing Environment)
There is a 2008 Workshop Manual for Chinese MG TF issued by NAC MG UK. It gives electrical repair procedures but no wiring diagrams unfortunately.