Switching between Series and Parallel

[inf0]

Hello!

I've been breaking my head trying to make a wiring diagram to switch between parallel and series for VTB2281 and I would really appreciate your help.
Only wired the primaries for now! ( 3 pole Single throw )



Thank you!

 

[beatnik]

that seems fine. dpdt switch would be enough

 

[inf0]

I'm a bit confused regarding the numbering on the secondaries. on the diagram it shows a different order. Maybe I'm confusing pins with terminals I guess?
Here's my revised version if anyone could verify