Physical differences between MMM V1, V2, V3?

[simplechamp]

I have a MMM in my E-revo and just bought another used one for my truggy. One of them has all five 6.5mm female bullets directly on the ESC board. The other one has three 6.5mm female bullets on the board for the three motor connections, but has the battery power input wires directly soldered to the board.

They are both supposedly V3, yet they have different connector setups? How can I tell what version they are for sure?