I am using the 2p8s modules, the 16s are probably similar. Orange is the cell taps and yellow is the temp sensors.
Just start at one end with a probe on you VOM and find the other end, where you will read the total pack voltage.
It is then simple to go down the line as each cell (probably a top row pin & the bottom row pin below it) sequentially adds up to the total system voltage.
As I recall the top most (pack +) and the bottom most (pack-) have 2 wires each, going to 2 pins. You will read no voltage between those, but the same from either multed set to all other cells.
The temp sensors will read a resistance, (maybe around 1kohm) between leads, and no resistance to any other yellow wires. They are not polarized.