Cut the black wire and insert the circuit. Do not forget some large shrinking tube to cover the whole circuit later (not pictured)

Add a wire between the gray-wired connection tab and the resistor R2 (white wire in the picture). Add some shrinking tube to the resistor to prevent short-circuits.

WARNING: Do not solder the wires when the connection tabs are in the plastic holder - the plastic will melt. Remove the contacts from the plastic before soldering

Shrink tube over the whole circuit.