errors trying to update board relation column

I have two linked table (Contacts and Properties). I want to link a contact to a property via a “Properties (Links To)” column. I have the item id’s that I am wanted to link. Here is my query:

mutation {
change_multiple_column_values(item_id:9260641574, board_id:6605619623, column_values: “{"connect_boards" : {"item_ids" : ["9260641574", "9260379507”]}}") {
id
}

This is modified from the documentation here: “Connect boards

I have two questions:

  1. When I run the code (I am using the api for python), I get multiple syntax parsing errors. What am I doing wrong?
  2. The table has multiple “connect_boards” columns? How do I specify which one I want?