I'm ordering a master cylinder probably from Rockauto for my 1999 Dakota R/T. I see the Cardone and Raybestos brands had an electrical connector there but my original doesn't have a connector. What is that suppose to be for? Also the Centric and Raybestos have huge resevoirs that look like the one on my friend's 2004 Dakota SLT. The master cylinder I have on my truck now appears to be original and looks like the Cardone resevoir without the electrical connector. What's up with the huge resevoirs for this year? Does it matter?