First off start with a 1.5mm2 through crimp (it's basically what electricians using for joining cables)
Remove the plastic to leave the metal tube. Careful not to damage the metal with the knife.
Here we have the rest of the bits, heat shrink and bright red small LED. I used the drill bit to ream the end out so the LED would sit better.
Shrink the heat shrink to hold it all together and, Finished product.
As with all LED make sure you use a resistor.
