after removing the supports, clean the holes with a 2mm, 3mm and 4mm drill depending on which hole^^
then you can put also the part with the thread on, and there you can insert a ptfe tube connector to use the tube as a guide from your filament box to your extruder, to reduce friction.
to connect the filament sensor on the left extruder you have to make the cable a little longer.
If you put the cover back on properly, everything works smooth =)
3Dee HT-PLA HT-PLA
I designed this because the stock filament sensor was a mess.