Defi ADVANCE Control Unit (DF07703 Manufactured in and before January, 2012) - Manual (Page 21)

6 -3. How to solder・How to use the solderless connectors
Caution
Wear protective gloves to avoid getting burned during soldering.
Soldering is a better choice for wiring. Make sure no loose connection is
found.
Confirmation
The solderless connectors that come with the product are for cable core of
0.3mm ~ 0.75mm diameter. Use them within the range.
Do not use the solderless connectors on wires that have thicker cable core
than 0.75mm diameter. Cable core might be broken and produce heat.
● How to solder
● How to use the solderless connectors
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