A little hard to see, but a black coiled wire comes up through a hole drilled in the front right corner of the shift plate access cover and attaches to the Hurst Line Lock switch mounted on the shifter. Apply brakes, depress and hold switch, release brakes and the front brakes are set with the rears free. I burnout and launch using that switch (left foot off the brake and planted firmly to the left, right foot bringing the rpms up for launch and on the third yellow release the switch and drop the hammer).