HELP with identifying console gauges circuit board

[catseye99]

Just after I bought my 2004 SSR I purchased a 3 gauge console pod

Being uninitiated, it was the wrong one.

It was brand new, never installed 2005-2006 pod that I decided to keep

A few months later I found & bought a 2003-2004 pod from Blackie

I am just now getting around to installing the pod but I am puzzled!!!

Upon examining the 2 gauge sets, it looks like the circuit boards & their chips etc., are visually identical.

See pictures below.

I am guessing that this can't be right as the only common gauge between the 2 versions of the gauge sets is the Voltmeter.

The only visual difference between these 2 boards seems to be the small 'code' on the upper right corner of the face of the board. One says 'B 02' & the other says 'D 03'
Probably a date code????
Both boards are stamped in the lower right corner "SSR gauge version 2.3 VT123813"

I also picked up a spare board along the way
That board is also shown below.
This board cicuits are configured totally different from the other 2 boards.
Lower left corner of the face is stamped 'SSR-CXX2'
Lower right corner of the face is stamped 'SSR GAUGE VERSION 4 Meesh Parts'

Long story but can anyone tell me what these boards work with & what I need for the 2003-2004 set.
Don't want to get these installed & find out that I have used the wrong board.

This info would probably be helpful for other Fanatics as well

Thanks for the help