Not in the direction he's cut the wood. Also the number of layers strengthen the wood even more so it's even more difficult for the wood to expand laterally. In the humid air the wood will swell and the layers may well split.
Maybe removing the sleeves on the cells will help enough but you will...
Yes, I mean in Section B. FYI: 202 = 20(+2 zeros) so 2000R.
Do you have very sharp probes? You should be reading a voltage on the resistors as they are connected to each series set. Have you fully pushed the connector together because it looks clearly out to me.
The soldering on the balance connector looks horrific. Can you check you have voltage on the 2kR resistors. Also the connector is out slightly. Push it back in.