Power Cable will not fully insert. Help.

Dump this cable ASAP!!

Calm down Edward.

You should have received a slip of paper with the cable noting that the connector can be very tight. That’s so that an excellent grip can be achieved. In cases where it’s very tight, I believe it’s recommending that you gently insert and remove a wooden toothpick between the three pairs of gripper plates. A little at a time, as you don’t want to loosen it too much.  Just be sure the toothpick is strong enough so that it doesn't break.  Not sure about the alternative of using a small flathead screwdriver.  It's metal on metal, but then the connector to the socket is metal on metal too.

@twoleftears  I did indeed. I was unsuccessful in this but it’s probably due to my lack of experience. The first power cord took some effort but nothing like this. 
 

I love the effect these cords have and I have to say I agree with those who said power cords were as/nearly as big an improvement as speaker cable.  I didn’t and still don’t completely understand why or how, but love that they do. 

It’s funny,  I have bought power cords that are so tight they were a pain to insert and I’ve bought a power cord that was so heavy and the plugs fit so loosely, it would not stay in at all! I literally had a Block of wood under the plugs on both ends to keep them from falling out.

Live and learn.