I find that strange because the MC generates a symmetric signal and that is a very useful thing as they also have a notoriously weak signal.
So i find it only natural to make use of that.
The connection to a symmetric male plug shoul be fairly easy:
The centerpins of the Chinch-connectors are the hot or + line which goes to Pin 2 on the XLR of the respective side.
The Sleeve of the Chinch is actually the - or cold side of the symmetric Signal which goes to Pin 3 on a XLR.
The Ground just stays where it is, i will connect it as it was before.
As far as i understand it i can even experiment with not connecting the ground at all.
The XLR in itself does not need a Zero connection as it is organised symmetric by crossreferencing (is this the right word?) the 0° and 180° Signal.
That leaves us with Pin 3 on the XLR plug. This one connects to the sleeve of the XLR cable an is connected ONLY ON PRE-SIDE.
Well, that should be it.
(And regarding the other things which threadkiller mentioned, i will make a seperate thread regarding my DIY projects)