Just searched to see where people put him mostly, I guess the answer is doesn't matter. I think the most important thing is decide early, training him at one position using up potential points then moving to another will lower his effectiveness.
I'm training him as a winger, he starts with much better attacking qualities and I need my DL and DR to be better defensive than attacking (full backs rather than wingbacks) until I can improve my team more.
Anyone got a SS of him in the future? I'm wondering if he has the stamina/workrate to be a roberto carlos style 5-3-2 wingback.