battery cables

If this has already been posted before my apologies, but this guy explains what you SHOULD do with your PCV valve after modifications, ESPECIALLY if your blown! Explanation starts at 19:55. View: https://www.youtube.com/watch?v=RmimUZ0hjeA

Howdy, My positive battery cable is 2awg and my negative is 4. Is that a problematic combo? I searched the online and I found some duders with the opposite (neg larger than pos) & consensus was that that's okay, but I couldn't find info re my question. Thanks!