While I was carefully removing the ton of plastic foil wrapped around it, a metal part fell down. I could quickly identify it as one of the end-stop limit switch "springs". It turns out that two out of three had fallen off. Looks like they were squeezed/pulled off by the tight plastic wrapping.
I got very lucky and was able to bend the springs back into shape and fiddle them back into place.
I'd urge SeeMeCNC to package that part a bit more carefully and would advice that anybody who's receiving their printer to be very, very careful when removing the foil around the limit switches.
