Circular metal connector, Amphenol MS3100E(AIT0)14S-6S(S), 6 contacts size #16, female, box mounting (receptacle). Backshell can be mounted to secure the cable.
Spacecraft SCPT-02E-8-3AP, box mounting receptacle MIL-C-26482 metal circular connector with 3 male gold plated solder contacts size #20. Configuration 8-3A is the same with 8-98 configuration!