I was going to get better power cables than the cheesy one that the kit come with.
I was originally looking at summit.
Plastic one is ok, it is just preference.
Aluminum one are good compromise vs Plastic or Steel ones.
1/2" Steel ones would be excellent if you are building a bomb proof Humvee.
Im not too excited to pay top dollar for plastic.
I see your point but as long as you install it the right way, it would be fine.
Top lid should not come in contact with the terminals.
There are only two point you really got to worry about & if you have a cap for the terminal there would be no issue.
Also with the aluminum one I can powder coat the pieces.