I soldered on the rest of the SMD components. I noticed the PCB peeled back off the chip in one corner though so I plan to use kapton tape to tape off everything but that corner, use a couple alligator clips to pinch the PCB onto the chip tightly so it can't move, and then use hot air from a heat gun to reflow that corner so it reattaches to the PCB.

Once that is done, I will attach jumper leads to the 6 inputs/outputs so I can run a full proper test of the whole circuit using a lab power supply and a multimeter.