Terminating Sennheiser HMD 280 Pro

[kinghong]

Hello, new to this forum but it seems the right place to ask help for my problem...

I just purchased a Sennheiser HMD 280 Pro Headset and it is un-terminated. (no jacks and loose wire ends)

the cable ends as follows:

Right:
----- red (+)
----- blu (-)

Left:
----- wht (+)
----- blk (-)

now it is my understanding that these will connect to a 1/8" stereo jack. i am not clear because i have 3 connectors on the jack but 4 wires...


additionally, it has 3 more wires labeled

AF-out
--- yellow (+)
--- green (-)
--- screen

i believe this i connect to my mic jack which is mono, right?


any thoughts on how to connect this to a jack?

thank you in advance for your help.