The whole clamp/activation card on the V2 has certainly been a subject of much fun debate.
The original 13 trace card that was used on the V2. Apparently, this is supposed to be screen accurate, and there is only one still shot that I have seen of this "possible" (see the bottom post) card that was on the prop. It DOES make sense because if they used one for Luke's ESB saber, I suppose they could have used on on the V2
Then there is this 7 trace card. It is a fact that a similar 8 trace card was used on the V3, and although it was never seen onscreen, it is shown in promo pics of the MR SE edition V2 (with the lever facing upwards, BTW)
Then there is this. Madcow had a very similar card on his original V2, and the pic below looks to ME like this one! Others say it's just the way the light is reflecting and it is actually the 13 trace circuit card. What say you?
In any event, I really like how the latter one looks on mine
It pays tribute to Madcow's original V2 and looks like the photo.
Oh, BTW for you V2 devotees out there, here is the vid that started it all for me.
http://www.youtube.com/watch?v=sIXrbZrLnD4&list=FLB5V1ePtLfAhVF8eT7e9aBg&index=48&feature=plpp_video