Upgrading DC Cables for Linear Power Supply

I have had various Ghent DC cables over the years. They always impress me. High quality, good workmanship, at reasonable prices. Shipping from China is surprisingly fast too

That is exactly the kind of thing I'm looking for. 

Two cables for modem and wifi router.

Three cables for M2Tech Hiface Evo 2/Clock/Supply.

And some future upgrades to come as well.

Purchases from China sometimes unsure what I'm getting.

China, yes, I was skeptical too a few years back. With Ghent, you have nothing to worry. I can vouch 100%

How do you know if your pin 1 or pin 2 is positive?

I’ve seen it mentioned in user manuals for a device. But many Chinese products don’t have proper manuals. One time I sent an email to a Hong Kong company and they told me.

I've also seen it in the product description online.