Post some pictures after please. I'm debating on the nex4100 as well. Like hte idea of removing the screen and just wanted to see what it looked like in the car. TIAFantastic news! I purchased both the TOYUSB-1 and 2 and was planning on seeing if either work next week when I have the 4100NEX installed. There was absolutely no information on this I could find even Metra says it isn't compatible even though it looks like the same exact plug from pictures.
Only question is what device are you using with the USB port? iPhone or Android? Asking because people say CarPlay is glitchy using certain USB cords.