my first check is measuring all cell voltages if they are in range 3-4.2V. Measuring single cell voltages at the input of BMS. BMS in the second picture looks as if some soldering lead where it should not be.
from my perspective I would say 3) (5V,GND,SIGNAL) (GND,SIGNAL) is safest and should work best. 1) could blow one controller and 2) is missing ground is unlikely to work