Can the connector you think of, handle both low current from sensors and high current for the 12 V in and motor drive out.
Also you might consider this alternative to F9P, and mounted in a PLCC socket (for exchange in case of fault) and with the neccesary breakout components around. https://www.skytraq.com.tw/homesite/PX1122R_PB.PDF
Also used in this thread: Dual GPS using SkyTraQ receivers
Edit here’s a tutorial on how to set up skytraq : Tutorial 6 — NavSpark
The store with a lot of info:
PX1122R : Multi-Band Quad-GNSS RTK Module - NavSpark Store
The datasheet does not indicate any GND on the back
http://navspark.mybigcommerce.com/content/PX1122R_DS.pdf