Upgrading DC Cables for Linear Power Supply

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.

I have used this below from LPS to Liberty DAC.   There's also a place in England MCRU (Mains Cables R Us), really, that makes them, not too expensive.  Audio Sensibility are very good, bit more expensive, Steven is knowledgable and a good guy to work with