Hate to do this but...BUMP!!!
I found this around searching for info regarding TG3 BL82 and full compatability with adapter,I was worrying in my post above about being able to power up the LED's and this is what I found from a chinesse website:
TG3 BL82: this is the industrial version of Deck 82, PS2 connector, BUT it requires 12v for the backlight to work, without it, it can only function as a normal keyboard. In order to get enough power, you need to get electricity from your Molex connector from you PSU, and be ready to do some DIY.