I think the point you may be missing, Wesley, is that FSAE is far less about building a race car than it is about learning how to design and build a race car. You can either buy a harness from one of about three guys I know who build top notch ones, you can just buy a car loom and dash/data logger from Pi or similar, or you can learn how they did what they did and do it yourself. I have a nice Pi Pro dash system sitting on my desk, with beautiful Lemo connectors, and in my three race cars I use 1/4" spade lugs. Two ends of a spectrum. FSAE could use either - if it was jusifiable and it made sense!
Brian