Here's what I'm working with: a 150w magnetic ballast, salvaged from an all-in-one reflector/ballast combo, & a cheap 6" air-cooled reflector.

Now what I need advice with, is this right here....

How do correctly attach these wires? I know the black goes to black, & the white goes to white, but what about the green?
Can I just attach the green wire to the other green that's screwed into the ballast frame?
Should I unscrew that wire and attach the greens together, isolated from the ballast frame?
Or should I attach the green wire from the reflector to a different spot on the metal ballast frame?
Any advice or suggestions are greatly appreciated!

Now what I need advice with, is this right here....

How do correctly attach these wires? I know the black goes to black, & the white goes to white, but what about the green?
Can I just attach the green wire to the other green that's screwed into the ballast frame?
Should I unscrew that wire and attach the greens together, isolated from the ballast frame?
Or should I attach the green wire from the reflector to a different spot on the metal ballast frame?
Any advice or suggestions are greatly appreciated!