Boba Fettish, this will all depend on which suit you are trying to make or if you aren't really set on ONE particular suit and plan on doing a combination of the different versions (as most people do) then you are pretty much free to do whatever you want. Here is a basic rundown:
Preprepro (Albino): One braided tube on the right gauntlet and none on the left.
Prepro: One braided tube on the right gauntlet and one braided tube on the left.
ESB: One braided tube on the right gauntlet and none on the left.
I don't think I have seen a pic with 5 hoses attached at once but I may be missing something. As you mentioned, in ALL of the movie versions the hoses run up the sleeve and stop at the top of the shoulder. However, on the prepro suit the hoses run under the backplate. Not sure where they end but it is doubtful that they actually attach to the jet pack. Hope this helps!
RotJ: Three braided tubes on the right gauntlet and none on the left.
ANH SE: Appears to have no hoses at all. Poor pics make it hard to say for sure...
RotJ SE: Appears to have one braided tube on the right gauntlet and none on the left. Again, poor pics make it hard to say for sure...