The objectives were curiosity (understanding how it works) and finding the missing pin so we can power up the module. The reverse-engineering isn't good enough

The objectives were curiosity (understanding how it works) and finding the missing pin so we can power up the module. The reverse-engineering isn't good enough to build a new one, e.g. I didn't figure out the capacitor values. I don't think the silicone had any other purpose than keeping the components in place.