Quoted from Shredder565:
so, just to see if I have this right. Two go in the top and bottom on both sides, two green, two yellow. and the third is to chain another light?
Are the "two" and "third" you're talking about the three terminals on a 3-terminal lamp socket?
If so, the three terminals are there for convenience in attaching the diode, needed for the lamp matrix. It's usually wired like this:
Red/Stripe (row) wire comes into "bottom" terminal, the one that's not connected to either contact on the inside of the socket (check with a voltmeter to make sure you've got the right one). The striped side of the diode also attaches here.
The other (non-striped) side of the diode connects to one of the "side" lamp terminals (one of the ones connected to an inside contact).
The Yellow/Stripe (column) wire connects to the other "side" lamp terminal (the other one connected to an inside contact).
So the effective circuit at the bulb looks like:
Column = Yellow/Stripe ----- Bulb ---- Diode >| ---- Red/Stripe = Row
The chaining is usually on both of the wired terminals - you usually have two each of the red/stripe and yellow/stripe wires coming in, one going off to the next lamp in each direction in the daisy chain for the row or column, respectively. The exceptions are the first lamp in each row/column chain, which has just one red and/or yellow wire that connects back to the CPU board, and the last lamp in each row/column chain, which has just one red and/or yellow wire off to the second-to-last lamp in its chain.
So on the "bottom" terminal, you'll usually have three leads soldered - two red/stripe wires and one diode leg.
(I hope I understood the question correctly - sorry if I made up my own question and answered it instead!)