1) trace the wire to see where it is connected
2) Find the Dice owner's manual PDF and see if you can work the options like it states. If yes, you probably have a Dice. If none of the options/commands work, then it's something else.
'02 ///M5 Imola Red / Imola Red '09 335i Alpine White / Coral Red
'04 E55 AMG Brilliant Silver / Anthracite
'96 318i Alpine White / Black
'01 330Ci Titanium Silver / Coral Red
'96 328i Jet Black / Black