Great start! I have couple of scan that hopefully help you finish it. Sorry should have post these yesterday. First, here is the profile of standard 332 xxx series camouflage and rudder scheme:
And next from upper side, this is most probably used scheme in 332 xxx series. As you can see from earlier page pictures of actual plane, this is probably case with "yellow 1" too:
Here's close up how wing root area was painted on early and late schemes:
And lastly, this is my personal befielf:
Looking again actual pics, to my eye this area seems to be exactly same color as tail, i.e. lighter shade version of RLM 75. This would make sense also when comparing it to standard camoulfage scheme of 332 xxx series.
But again, these are my personal opinions and notes, feel free to agree or disagree, you're the artist :)