This Sidemount uses the original sovol Spoolholder to relocate the spool to the front right side of the printer. There is also a version for M3 heatinserts. It fits on the Zero's 152x152 buildplate if rotated 45°.

To mount, remove the original spoolholder, remove the filament sensor. Remove the lower 2 screws which mount the right sidepanel to the frame, replace with M3x16 Screws and fix the printed part. (add Heatinserts first if you chose that version) 
Add the Original Spoolholder using the two screws which originally held the side panel in place. Mount the filament Sensor to the relocator using the original hardware, mount the relocator using the two screws above the exhaust fan.

BOM

1x Printed Spoolholder
1x Printed filament relocator
(2x M3 5mm OD Heatset inserts if you print the version with those)