Was wanting to call Hekili info into Plater so that the buttons show up on the Plater Nameplate. What .lua would i be calling or dofile to achieve this?

If you're doing anything in Plater, the only thing I can provide is the Hekili_GetRecommendedAbility() function.

Hekili_GetRecommendedAbility( "Primary", 1 ) returns the recommended ability in the first icon of the Primary display.

Spell 257284 is Hunter's Mark.