To tell you the truth, I don't even remember is the MM comes with any plugs. I think that the systems (motor/esc combos) some wired up with plugs, but I don't know if the esc alone comes with them. In any case, I believe the 4mm plugs to be too small for the large scale application. I'd go with the 5.5mm plugs, at least. The next time I re-wire everything, I might just go with deans plugs all the way around. The bullet connectors loosen up over time.

Anyway, chances are that you're going to have to do some soldering. I take having to do some soldering as a given. The MM does come with 14 gauge wire, although it is high quality wire. I've rewired all of my MM escs with 12 gauge. The 14 gauge gets quite hot.