3: 152v
Nothing connects here in the build, and nothing connects here in your build. Are you sure that wasn't terminal 4?
6: 5.1v
How's terminal 5? I would suspect that the black wire that grounds terminal 5 isn't well connected/soldered on one end. Either that or the 1M resistor isn't well connected/soldered (though it looks OK from the photos). This is a big problem though, this will throw things off on that side of the kit.
18: 151v
19: 150v
20: 150v
26: 150v
You have a miswire on your B socket. The center post is floating.
28: 90-115v
30: 150v
These are also terminals that connect to nothing. Maybe you're seeing 90mV here, which would be 0.090V. If that's the case, maybe that's what's going on with terminal 6?
44: 74v
45: 70v
You can ignore these. There's AC voltage here that may throw off your meter.
47: 177v
This is only 3V off. It may actually drop a little more when you get the B socket wiring error sorted out.