Indeed, yes. I use this button also to switch on/off by selecting 5 on the software. You can then remove the switch and join the wires together. One less item to install/worry about, and the data is always saved, at least this works with my FW7.2.
When you've finished the race hold full brake for 16 seconds and it will switch your car off remotely..which is very cool.
I'm getting the rev/speed/current data as usual on the FW10.2 but zero for motor temp and 0.63-0.71v on battery voltage.
I'm wondering if its a matter of calibration because there are sliders for this as well..?