knock sensor size?

[jt15833]

I don't have the CA lower harness so I need to hard wire a wire to the co ax pin on the knock sensor, but it is proving to be very hard while the sensor is on the motor and motor in the car. If anyone knows off the top of there head or someone who has motor out of care could measure this for me, i'd really appreciate it. I know its more then 20mm but lesss than 27mm.

[yourmomsrps13]