I took 2 pictures of mine. One clip clips on between, in the middle of, the last (closest to the firewall) and 2nd to last valve cover bolt. Hopefully you can see it in the pictures. The flash on phone doesn't work for crap and I forgot to bring a flashlight out to the shed with me. The rusty bolt in the 1st picture is the 2nd valve cover bolt in from the firewall. The last valve cover bolt is blocked by the hose in the pic.
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My best guess is the other clip goes on the back of the head or valve cover. Again I forgot my inspection mirror when I went out and even so I doubt I'd have been able to see anything back there. It's pretty tight back there. I didn't feel around back there since cold weather/a lot of cold plastic, standing on a cooler just to be able to see back there, and with my luck I would break something lol. It's got to clip back there though since following that wire along from the clip you can kind of hopefully see in the picture it doesn't have a clip again until the front on the head. Or at least that's my best guess where the 2nd clip goes.