Here is a listing of the 17 pin and 14 pin connections. No need for the Motif P9 connections. Read as follows for the encoder:
Encoder 17Pin Colour Terminal 14Pin Colour Terminal
BK(GND) WT/RD K WT/BK J
The original 5C had a TTL encoder, the XYZ axis had a differential encoder. If you have a receiver board it is probably set up for TTL on the 4th axis. Check if the A axis connects to the receiver board or to the Motif board.
The original 5C drawing shows the TTL wiring, the 5C Rotary cable shows the wiring with the differential encoder.
Original 17 pin Haas wiring drawing attached also.
A SERVO Brush Rotary Table Connections
Encoder 17Pin Cable 14Pin Cable 7Pin Motif P9
BK (GND) WT/RD K WT/BK J BL P9.1
BR (Z+ CH) OR P OR I BK P9.6
OR (Z- CH) WT/OR C WT/OR C RD P9.5
BL (B- CH) YE N YE G -
GN (B+ CH) WT/YE B WT/YE B OR P9.3
YE (A- CH) BR M BR D -
WT (A+ CH) WT/BR A WT/BR A WT P9.2
RD (+5V) RD L RD K BR P9.4
GN P9.7 (SHIELD)
MOTOR
MOTOR WT E/F WT E
MOTOR BK J/H BK F
GND GN/YE G GN/YE N
TEMPERATURE
TEMP RD L BK L
TEMP WT/BK T WT/RD J
HOME SWITCH
HOME RD L -
HOME BK K -
HOME BL D -
H BRAKE UNUSED
M BRAKE UNUSED