[Mike_The_Grad]

I see what you mean. I have a clip very similar to the #1 clip, but it fully wraps around the trans cooler lines. Same spacing I believe. I'd have to go dig around my parts jars in the garage. I'm sure I have a couple of clips that can add to the confusion, which is why I have them in a jar and not back on the truck.
My thinking is that GM probably made that clip you have there for the battery cable rather than the transmission cooler lines because the battery cable would probably need servicing more often than transmission cooler lines. And having the ability to remove the cable without detaching the clip is easier for the guy performing the service.