I know that is no smart solution. I would like to connect two parallel 25mm² wires from lynx two 4xUS3000C. So I have 2 x 50mm² to the batteries.
For the pictures I have had only a red and a black cable. Imagine the cables have the same color.
What is "better"?:
Solution 1
for nicer view without spring and spring washer
Solution 2
only with spring washer (no space for washer) and 5mm massive copper plate as spacer.