Does anyone know how to link custom Loot tables to Suspicious Gravel/sand?

I've been trying to link a custom loot table I've created to suspicious gravel (via adding the Loot table within the element as "ModID:gameplay/archeology/Loot_location" I tried to add this with /give @p suspicious_gravel{BlockEntityTag:{LootTable:"/loot give @a loot modid:gameplay/archaeology/loot_location"}}), although I have had no success. Does anyone Have Any Ideas on How to do this? I feel like it's something very obvious that I'm not understanding.