The 3 zip tie channels on the back of the adapter mount are to secure the wires from the noctua and stepper, and then route them up to the top to the top anchor point. The channels loop internally, so insert a zip tie in the in the bottom and push it through until it comes out of the top. Look for 6 holes on the back of the mount, on the angled face at the bottom.
Don't use the internal channel for the filament sensor cable, route it directly to the anchor point on the top. There is an EMI issue that surfaces if you route it internally. What remains is mitigated with a EMI filter, see notes in my log.
There are 3 x M3 10mm screws that secure the bracket to the x carriage, and they line up with the original holes in the carriage. Make sure to sink & secure 4 x M3 .5 nuts into the back before you put it on the carriage. I wicked in a drop of CA on these to make double sure they don't unseat after installation. This makes it so that you can service the hotend without disassembly of the entire unit.
One other lesson learned I need to add to the log is that the bundle of wires needs to be wrapped with electrical tape or the like to protect it from abrasion against the top anchor point.