I have designed this model in Fusion, as ECOFLOW do not sell this type of accessory in AUS. It attached to the top of the ECOFLOW River 3 Plus with command strips from Bunnings (see picture for details on this). I printed this from Bambu Lab ABS, as it will be in my car quote often, but i think PETG would be ok too. I use generic hook and loop cable organisers to attached the cables to the cable tray.