Hi,
No idea, blue conventionally neutral and brown single phase live. Black is conventionally used for two and three-phase. As guessing from photos and second-guessing manufacturer wire colour choices is silly and irresponsible, I strongly suggest you look for the wiring diagrams or numeration that should be on the packaging/devices themselves/provided by the manufacturer/vendor somewhere.
P.S. Picture #2: Hmmmm, niiiice invisible PCB to hold parts with flimsy wires in place
. Safe, if never shaken or dropped.