Another Electronic Speedo Question..4 out Buffer wiring

[notsolo]

Trying to get the electronic speedometer working, 1993 5.7L 4L60 with vss wiring... I wired the A10 from the ECM to the back of the speedo, did not realize that it needs the buffer module. I hope this is what it needs.. 7 wires on the buffer, pink power, black ground. (F) Brown input from A10.. 2k... (C)Green output to back of speedo 4k? My module is different of coarse (C) is another brown wire.... Are the yellow and purple wires needed? Thanks in advance...Ed