GraphQL grouping multiple fields of another type

Question

I have the following type

type Build {
    slot0Item: Item
    slot1Item: Item
    slot2Item: Item
    slot3Item: Item

    primaryKeystone: Keystone
    secondaryKeystone: Keystone
    resolveKeystone: Keystone
}

Which I'm trying to restructure by grouping related fields under a common field. I'd like it to look something like this:

type Build {
    items {
        slot0: Item
        slot1: Item
        slot2: Item
        slot3: Item
    }

    keystones {
        primary: Keystone
        secondary: Keystone
        resolve: Keystone
    }
}

(1.) I've tried two approaches so far, first is to introduce a new type *Slots

type ItemSlots {
    slot0: Item
    slot1: Item
    slot2: Item
    slot3: Item
}

type KeystoneSlots {
    primary: Keystone
    secondary: Keystone
    resolve: Keystone
}

type Build {
    items: ItemSlots!

    keystones: KeystoneSlots!
}

But with the above approach, fields of *Slots types have to be mentioned individually to be returned with the query result, and I'd like them to always be returned.

(2.) So I tried defining ItemSlots and KeystoneSlots as scalars, with which I'm able to always return all fields, but now I cannot specify what fields of Item and Keystone should be included.

Approach (1.) seems to be the best so far, but is there a way to query the fields items and keystones as if they were an array, but the returned results are (key->value) objects?