Better cables than these splintery silver ones

I got a Renogy kit last summer with 20A Rover MPPT Charge Controller. I love everything about it except that connecting the cables to the controller itself is a freaking pain in the ass.

Anyone else experiencing this?

The cables that go to the panel itself are this splintery silver crap and they don't go into the tiny rectangular terminal in the controller at all.

Have people in the community found a solution for this?

Looking around for a better connection to the controller and I'm wondering if I grabbed these and connected them to the charge controller:

www.amazon.com/Grape-Solar-GS-MC4-CC-6-Inch-Conversion/dp/B00MS8AKRU

and then ran these to the panels

www.amazon.com/Signstek-Double-Layer-Extension-Panels/dp/B00Q2OFG2A

would that work?

I don't see why it wouldn't work.... That's similar to what I have running from my panels...

I have had problems connecting leads into my wanderer charge controller. It's not easy. You think they are in and then they fall out. After several loosening/tightening did get leads to stay attached. Also, it seems easy to strip the set screws if tighten too much.