Can you join 2 thin wires with a thicker one?

[MrPinger]

Howdy, I was wiring in a couple LED lights for my trunk bar and diffuser but ran into a maybe problem. The trunk bars wire wasn't long enough for where I wanted it to go and what I purchased after turned out to be a larger gauge. Can I use a thicker wire as a link between 2 thinner ones?

 

[narkedatninety]

Yes, you can. Upsizing a cable isn't going to present a hazard.