On Sun, 12 Mar 2017 17:44:58 +0630, yky wrote:

What connector is used to splice 5 mm power cable? Cannot be wire nut,
can it? Photo links are highly appreciated.

Split bolt or a set screw style connector

https://static.grainger.com/rp/s/is/image/Grainger/6CYZ0_AS01?$lgthumb$
https://www.amazon.com/Panduit-PNLC-.../dp/B00B5P52UM