Rear diff breather goes straight up and routes to behind the LHS tail light. Just pop the 2 screws of the tail light to get to it. Fairly good location for it already, if you manage to drown that you've got bigger issues than getting water in your diffs. Whacking a filter on the end of it wouldnt hurt though.
Transfer breather outlet is just infront of the transfer stick, runs along the top of the gearbox and joins to the gearbox breather outlet via a T-piece. This continues to run along the gearbox (its held in with clips on the RHS) above the bell housing and up the back of the engine bay slightly. Wouldnt take much to extend it further up into the engine bay more.
Front diff breather I don't actually know off the top my head, havent bothered looking for it yet
EDIT: Probably should have mentioned thats for my SV420, I assume the earlier vits are the same though?