The hot end heater should ideally use the included bootlace ferrules. (White plastic with round tube) but due to the tight quarters of the Ender 3 Pro case, we will use the bare wires directly in the screw down terminal block.
Ensure that the wires are twisted tightly together, insert the wire end completely into the E0 heater terminal, and screw it down firmly.
You may need to trim the length of the bare wire so that it fits entirely within the connector with no visible wire strands.
If you do wish to use the ferrules with the stock enclosure, you will likely need to make a small cutout for clearance, or use a different enclosure all together.
Further information on hot end heaters can be found in the wiki.
Connecting extruder heaters
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