The laux is a completely open species (as most closed species aren't legally enforceable, anyway) somewhere between augmented and synthetic. They started out as lynxes who modified themselves for mostly aesthetic reasons, but generations down the line, their bodies started to evolve more towards better compatibility with electrical connections, making further modifications to themselves easier. By this point, all the the non-modular 'electronic' stuff is organic in the sense that it naturally grows from the laux. Of course, lauxes don't produce their own plastic and glass, but instead use other organic compounds, such as the material their fur and claws are made of. Lauxes do however require more copper intake when they're young to produce good connections on the DIN sockets. The RGB ears are bioluminescent, however, some lauxes will decide to instead replace their biological ears with module sockets for microphones, which opens a whole new world of possibilities. Generally speaking, an unmodified laux's body will be externally identical, however, internally, there are many connection points than could be used to modify the laux's body as well; this also makes gender-affirmation surgery easier on lauxes.

Between the electronic modules and their brain, their brain effectively functions as a microkernel (we wouldn't want the entire laux to shut down in the even their eye module driver experiences a segmentation fault, would we, now?). On first connection, the module would negotiate drivers with the laux on Tx&Rx pins 1 in serial data. From there, the driver handles everything, and there's no requirement for any of the pins to remain serial. For example, a cheek speaker module would only need +5v from pin 6, and to receive analogue sound data from pin 1, so after drivers are negotiated, there is no more serial data being sent.

Originally I was just going to call the species a 'synx', but then I realised there was already a species with that name, so I instead decided on 'laux'. Either pronounced like 'locks', or like 'faux' with an l (although most of the lauxes who pronounce it the latter have a bit of a superiority complex over rejecting their lynx roots or smth like that...).