yea that's parallel. check your basics before you get too carried away changing things. i was really surprised when i was doing a voltage drop test recently on the transbrake circuit of my new car. iirc it was losing around 3.5 volts between the battery and the solenoid which is huge. i went out and checked the old car, it was as bad if not worse and that brake has never once failed to set. now when it comes to cranking a big high CR engine things can really be a pita