Take two pieces of wire, check the way they were pushed through the extrusion die. Twist 12-14" of # 18 or 16 UP OCC SC copper with .99999 UP OCC Silver. 4-5 twist per inch Clockwise. Put the 2 in an air tube. Twist 8" of the two tubes. Zip-Ty to hold.
Kitty corner the - + from bottom left to top right. Remember the direction the wire went through the dies and that is the direction of the arrow for reference. Mark the outside of the air tube. Find someone to condition your new cables. You just built the best jumpers you can if your going to go that route. 1-200 hours and you can swap the position where you want. Once you make up your mind, find a good enhancer and treat the ends. Tighten everything and leave it. It only gets better with time.