Does anyone have detailed instructions with pics on how to do this?
There's this thread https://pinside.com/pinball/forum/topic/poor-mans-sub-addition but the pics aren't that clear to me.
I want to power some LED strips off the service outlet but don't want to blow up the machine or kill myself in the process.
I want to do it on my Johnny Mnemonic (WPC-S)

Thanks! Does this help?

B8466B10-DAAB-43D2-86F3-C414126F37E7 (resized).jpeg

Thanks, I think that makes sense! So I don't need to do anything to the white wires as http://www.flippers.be/power_wiring.html suggests?

Thanks GRUMPY and aeneas, I’ve had success. I’ve wanted to do this for a while but was too nervous to try, but it was pretty straightforward with your help.