Yep, wrote out a simple diagram of a 3 cell pack on paper last night and the solution became simple and clear. The Blinky "instructions" also have a pin outlet chart to go by and match things up. Negative of first cell to the farthest negative pin on Blinky, Positive of last cell to the first pin on Blinky. The two middle wires do act as a negative or positive lead, depending on which cell Blinky is testing. They go to the 4V or 8V pin outlets on Blinky respectively, depending on which lead is which on the battery. Anybody looking to figure this out can look at the Blinky directions and it'll become clear. If you still are confused then follow the criteria Blinky lists and use a volt meter to determine which is the 4V+ and which is the 8V+. It depends on which sequence of cells Blinky uses in order on the pin outlet (from negative to positive or positive to negative in series as listed on the pin chart). I believe Blinky lists it as starting on the negative side (furthest negative pin). In other words, the main negative battery plug wire is the cell that's negative's trace should go to the furthest negative on Blinky. The trace connection between this cell's positive and the negative of the next cell is the 4v+ terminal that would go to that pin on Blinky. The trace between this cell's positive and the negative of the last cell is the 8V pin wire. And, then the positive lead of the last wire (which also is the main battery plug's positive wire) would go to the furthest away positive pin of the four on Blinky.

Glad to hear somebody else used Dymond batteries. I'm pretty happy with mine that I bought last year, having put them through all kinds abuse. One even spent a night in a tree after the low voltage cutoff was hit in flight. Managed to recover it by slowly charging it a few minutes on Nimh charger to get it's voltage high enough for my lipo charger to recognize and charge. This is VERY dangerous so don't do it without knowing what you are doing and wearing the property safety gear in a fire/explosion proof open area. Did you have any trouble soldering to those traces/solder? I'm hoping I don't have to track down some special aluminum solder if it is.