man, reading diagrams etc just confuses me more...
id love some help.

So... here is how i have it wired now... im stumped as to the next steps. or even if im right.

I have the DC to DC relay you recomended btw.

Input side
- to - side on the rumba board HB
+ to the + side on the rumba board HD

+ side on the output (its not labeled) going to Power supply +
- side going to the heat bed

one of the heat bed wires going back to the PS - slot.

i dont know if any of this is right i wont power it on til i know though. dont want to fry something.