Winch wiring is confusing if you're thinking of standard wiring with red and black as positive and negative. With a winch: black and green are in and out and red is ignition (or batt if you wire it that way). If you are using a lighted switch you will need to run a separate ground wire to the switch.
Standard on-off-on momentary switch for winch is: 1 and 4 to out (or in if needed reversed direction), 2 and 5 to ignition power (or battery if key off use is needed), 3 and 6 to in (or out if needed reversed direction), and 7 to ground.
Your image above shows a handlebar mounted rocker (like what is used on an atv) which are usually not lighted so no ground wire is present (or needed). It also shows a wired remote, and I'm not sure why the extra black lines are drawn on there. But if you need extra controls, they just need wired in parallel. So, they would need wired the way it originally shows, all the greens go together and all the blacks go together.
Just a final reminder to not confuse the black wire of the winch controls with the black ground wire of the pulse bar (or any ground that is).