Stackinge subgraphs on top of each other

[NeoCortex97]

I am using mermaid to render a network documentation. I have to create a diagram showing network infrastructure by floor and wouldlike to use subgraphs stacked on top of each other, but the elk algorythm only stacks them in a spiral.

How can i influence the placement of subgraphs?

Thsi is the Result that I got and I will post the code below:

flowchart BT
    subgraph KG
    direction LR
        Server0
        Switch3
    end
    subgraph EG
        direction TB
        Switch2
        PC4
        PC5
        PC6
    end
    subgraph OG1
        direction TB
        Switch5
        PC10
        PC11
        PC12
    end
    subgraph OG2
    direction TB
        Switch4
        PC7
        PC8
        PC9
    end

    subgraph OG3
        direction TB
        Switch1 
        PC1
        PC2
        PC3
        PC13
    end

    Switch3 --- Server0
    Switch2 ---- Switch3
    Switch2 ---- Switch3
    Switch2 ---- Switch3
    Switch2 ---- Switch3

    Switch2 --- PC4
    Switch2 --- PC5
    Switch2 --- PC6
    Switch2 ---- Switch5
    Switch2 ---- Switch5

    Switch5 --- PC10
    Switch5 --- PC11
    Switch5 --- PC12
    Switch5 ---- Switch4

    Switch4 --- PC7
    Switch4 --- PC8
    Switch4 --- PC9
    Switch4 ---- Switch1

    Switch1 --- PC1
    Switch1 --- PC2
    Switch1 --- PC3
    Switch1 --- PC13
    Switch1 ---- Switch2

    KG --- EG --- OG1 --- OG2 --- OG3

This is my code:

flowchart BT
    subgraph KG
    direction LR
        Server0
        Switch3
    end
    subgraph EG
        direction TB
        Switch2
        PC4
        PC5
        PC6
    end
    subgraph OG1
        direction TB
        Switch5
        PC10
        PC11
        PC12
    end
    subgraph OG2
    direction TB
        Switch4
        PC7
        PC8
        PC9
    end

    subgraph OG3
        direction TB
        Switch1 
        PC1
        PC2
        PC3
        PC13
    end

    Switch3 --- Server0
    Switch2 ---- Switch3
    Switch2 ---- Switch3
    Switch2 ---- Switch3
    Switch2 ---- Switch3

    Switch2 --- PC4
    Switch2 --- PC5
    Switch2 --- PC6
    Switch2 ---- Switch5
    Switch2 ---- Switch5

    Switch5 --- PC10
    Switch5 --- PC11
    Switch5 --- PC12
    Switch5 ---- Switch4

    Switch4 --- PC7
    Switch4 --- PC8
    Switch4 --- PC9
    Switch4 ---- Switch1

    Switch1 --- PC1
    Switch1 --- PC2
    Switch1 --- PC3
    Switch1 --- PC13
    Switch1 ---- Switch2

    KG --- EG --- OG1 --- OG2 --- OG3