Someone please point me how to add funds in
Usually this is the treasury account ID - 5EYCAe5ijiYfyeZ2JJCGq56LmPyNRAKzpG4QkoQkkQNB5e6Z which is generated using the pallet-id of treasury so it is deterministic across all substrate based chains until the pallet-id is modified.
So a normal transfer to this account should answer your question.
To get account id for a pallet-id use the below command using subalfred tool.
subalfred key --type pallet --show-prefix 'py/trsry'
What about doing a simple balance transfer to the account id of the treasury :)