These solder splice connectors are amazing for quickly connecting two wires together.
They come with a small amount of solder in the middle of the connector which, when heated with a heat gun or lighter, will melt and securely connect two wires togehter.
The heat shrink will also shrink don on the wires to further protect the connection from the elements.
 
This connector is for the blue size of wires, 16AWG - 14AWG.
 
Comes in a pack of 10 units.