I have never seen a completed Z-Axis Assembly so the first photo does not mean anything to me. There are two laser cut acrylic parts and it is immediately obvious which is needed first but the next instructions as to which way up the part is and which way the "nuts" (they are not nuts) are fitted is not so clear. "Install the two Brass Nuts to the Top layer of the heated bed. Make sure the nuts are attached to the side with the text engraved. " Does that mean place the bed with the engraved text saying "Top Face Down" face down and inset the "nuts" from underneath? so the boss of the nut is underneath on the engraved side If so then say so (it's the word "attached" which is confusing) Sometimes the attached makes sense but it could refer to the "nuts" OR to the set screws. Even simpler.......Insert the brass nuts from the engraved ("Top Face Down" ) side......... and fasten in with the 10mm set screw and washer.