Relation to array field of global

Hi there! I was looking for a solution to create a relation from a

to an

of a

.

I have a global that recieves a Google calendar embed link and extracts the different sources. For each source I have the option to select a color via

.

export const Calendar: GlobalConfig = {
  slug: 'calendar',
  fields: [
    {
      name: 'embedLink',
      label: {
        en: 'Google Calendar Embed Link',
        de: 'Google Kalender Einbettungslink',
      },
      type: 'text',
      hooks: { /* hook that fills the calendarSources array */ },
    },
    {
      name: 'calendarSources',
      type: 'array',
      admin: {
        isSortable: false,
        readOnly: true,
      },
      fields: [
        {
          name: 'calendarId',
          type: 'text',
          admin: {
            hidden: true,
          },
        },
        ColorPicker,
      ],
    },
  ],
}

In my

that I'm creating I would like to reference these sources and choose which one to display in this block. I'm looking for something like this:

export const CalendarBlock: Block = {
  slug: 'calendarBlock',
  interfaceName: 'CalendarBlock',
  fields: [
    {
      name: 'sources',
      type: 'relationship',
      relationTo: 'calendar.calendarSources',
      hasMany: true,
    }
  ],
}

I would like to reference the

array on the

. Which obviously does not work since it's not referencing a collection.

Is something like this doable in a way that I'm missing?

Or would the correct approach be to create some sort of readonly

which I'd fill, instead of the array in the

?