Awesome, not sure how I missed that post of yours. Thanks!In that picture @Michael Lane is just using that splice point to feed the led strips which need 12v, if you splice 120v you will need a transformer to output 12v to the mosfet board and that is what he did. He mounted a transformer with heat shrink and used that to feed 12v to the mosfet. If you look for some of my posts you will see that instead of taping and converting 120v in the fixture I ran a separate 12v feed to the unit, either way works it just depends on how you want to do it.
Here is how I did it - https://www.reef2reef.com/threads/controlling-viparspectra-lights.698216/post-7528647