>need to connect different gauge wires to one another in field
>can't just take wires back home so soldering and hot air are not an option
>take part of the wires/devices that are no longer i use
>realize there are two wires with different gauges connected in some way with a shrinkwrap around it
>they probably soldered it and put shrinkwrap over it
>remove shrinkwrap
>not soldered, just twisted