I plugged the cord in to the inside outlet and run it out of the back corner of the lid, along the seat and then I put it in the holder in a cupholder in a lower console I had already bought from Amazon. It was meant to be temporary, but since I never use that cupholder, it's become permanent...
I saw that ad on FB. Price is way too high. You can get inexpensive retractable ratchet straps on Amazon. The only thing theirs adds is that it attaches to the Ltrack rather than hooking on.
FYI I just bought a USB-A female to USB-C male cable from Amazon. I ran the cable along the side of the console/seat and either plug in to one of the back ports or into the console.