Looking at the PDF help file (Page 5 of 6) for the Mala plugin, it says:
Nice Find.

. I attached a pic of it
I am thinking you could just create a CFG file and name it the same as your emulator (ie, Atari2600.cfg). Maybe using the same name as you have in your mala.ini or mala tree? Not sure what emu name it is looking for.
Unfortunately, I am at work and cannot try it out.
I interpret from this that you should label it the same name as you labled the emu in mala
[Edit] I just tested it and it works great

Just make sure you have the right path set-up for these files set up in ledwiz.cfg
eg:
1,1,1,1,0,2,1,3,50,0,1,C:\configfiles