Step2:
Remove the black isolation as shown in the picture below (~50mm from remaining harness).
Step3:
Remove the white cable isolation down to the shielding of the cable as shown in the picture below.
Step4:
Put the solder sleeve over the cable of the remaining engine harness.
Heat the solder sleeve (300°C – 350°C) with a “hot air gun”.
Step5:
Remove the white cable isolation at the end of the remaining cable harness.