This is a Stock maul, in which I honed out the plastic BH near where it connects to the sound module. I removed the female DIN module from a 2005 Vader and ground it down so it fit inside the maul BH like this:
Then I drilled and countersinked some holes and used the little set pins to hold it in place, routed out the solid front of the sound module so the wires had a place to hide, and connected the module (it looks stock at this point, but the converted goodness is all inside!):
Slid everything back in and voila!
But wait a minute, you say the Vader blade will not fit that maul! You are correct, so I had to customize the maul blade. I removed the internals (LED strip and make DIN connector) from the Vader, and slid them inside the Maul blade. I had to trim the diffuser so the plastic housing that holds the clash sensor and DIN connector would fit. I wrapped a single wrap of white duct tape around the housing so it fit snugly. I tapped the 4 holes in the Poly-C tube and inserted 4 set screws to hold the housing and LED strip inside the blade. Because of the DIN connector, the blade sticks out about 1 cm to far so the module is visible where the blade connects, but it is a small trade off IMO you can see it here:
Well, that's it! A Maul with "stock" MR blade via DIN connector.
The Glams:
and the Video:
P.S. Here are the sabers for this order (Bane and Maul) from DSW Marek: