How many Blade Detect Pin should I choose?

hi, guys. I have a big problem right now. I’d appreciate your help

I bought this Hilt Side PCB Connector And I’m going to install all the pins.
how many pins should I choose?

It’s not “how many”, it’s a pin number corresponding to one of the pads on the Proffieboard.
Blade detect is optional, please read this to see if it’s something you need/want:

Your right I thought it was a essential