I have searched for days for an answer, but I came up with nothing.

I have a T-60 single with a SDS computer and MSD ignition. I bought this car about 8 months ago and I asked the previous owner about the tach and gauge cluster and he said its "been disconnected" because the cluster doesnt light up and the tach doesnt work. when he said disconnected, I thought a wire or two was pulled out from the cluster. I checked all the wires and everything seems normal (from the cluster to the ECU). I checked the solders on the back, everything looks fine. I checked the fuses and there was nothing wrong. right now I'm thinking that I need a tach adapter for the MSD so that the tach could work, but I have no clue why the gauge doesnt light up.

any suggestions?