Editing drop rate of hero chests?

So I know we can edit drop rates of hero chests via –

Records --> Items -->Lootchests --> chestloottables --> chest_heroloot_all_01.dbr for normal

I also know that that lootxchance contains the chance a certain loot class defined via Loot1,Loot2,etc.

So with that, how do I adjust so that the first item is always either a rare or an Epic?

Bump

is it loot1chance = 500;0;0;0
and loot2chance = 500;0;0;0

?