Also a good advice by Offgrid Garage Australia is the Duppa Isolated 4 port adapter. It features 4 ports for VE.Direct communication, all isolated and blocks just one USB port of the Raspberry. And the cables are fairly inexpensive, reducing costs. Only the form factor is sort of not really usable. So, a mountable cse was needed. We won’t go into details. We jsut present it to you and give you all the links you need in addition.
Make sure you are not using the biggest USB-C plug. A small one will do and with the abundance of those cables you should find a suitable one. The model was published on printables and can be printed here if you don’t own a 3D printer.