How to identify backplate?

[teroyk]

I disconnected cables from two Pulsar IIs when I moved.
Problem is that first one has Plus Plate and second one has Classic-plate
and I don't know which is that Plus Plate that comes with XLR-cable.
How I can identify backplate, if it is without cable?
Can I check it from computer if cards are connected to computer?

[garyb]

there are a couple of extra ics on the Plus(balanced xlr) plate.

[Mike San]

Plus I/O Plate has green label on plate