well i have no experience with this so i do not know what it is called exactly... but i am interested in purchasing a piece so i can put 0g wire into my 4g amp terminals on my Diamond Audio D1000.1
I've been using those exact SoundQuest ones for years. Only thing I recommend is this:
put them in the amp and tighten the screw.
loosen the screw and remove them from the amp.
there should be marks on them now from the screws.
take a drill/bit and drill a dimple where the mark is. I used a 3/16" or 1/4" on mine but depends on the set screw on your amp, obviously
Also, when I was using them on my DDZ1, I had them turned sideways because otherwise they would touch, watch out for that! it's not as cool as you'd think when they arc! LOL Ok, it is pretty cool as long as you get luck like I did and don't harm the amp any.
EDIT: I guess that wasn't on my Z1 but it happened on one of my dual input amps... and yes, I painted the positive terminals red on my amp. Always have, always will.
Put some spacer blocks in there lift the amp off the box a bit and will give you the room I would use some rubber ones since you are mounted to your box it will help with the vibrations whice are bad for your amp anyways.