Can I add Aurora covers manually from a PC?

I'm running BadUpdate/BadAvatar with Aurora on an Xbox 360 Fat, and all of my games are stored on an external USB HDD.

I'd like to add cover art to my games without having to connect the Xbox 360 itself to the internet. Since it's a Fat model without built-in Wi-Fi, my only option would be Ethernet. I tried connecting it with an Ethernet cable so Aurora could download the covers, but for some reason I couldn't get the console online.

Is there a way to plug the external HDD into my PC and download/import the covers manually?

I'm thinking of something similar to the scraping process used with retro handheld frontends, where the PC can identify the games, download the correct box art/metadata, and save everything directly to the drive.

I've seen mentions of Aurora Asset Editor and more recently AuroraAssetsUsbDownloader. Would either of those be the recommended way to do this completely offline on the console, or is there a better method?

Ideally, I'd like to just connect the HDD to my PC, download the covers for all the games, plug it back into the 360, and have Aurora display them.

Thanks!