Guitar speaker cab series/parallel switching

I have two single extension cabs with a 10" 8ohm speaker each. Would the following doodled diagram work if I wanted to run one into the other as either series or parallel? I have amps that are 4 or 8 ohms only as well as a few that are selectable between 4,8, and 16 ohms so it would be nice to have it as versatile as possible. So the three jacks (in, series out and parallel out) on one cab and just a single jack on the second cab.

Edit:replaced crappy doodle. 🙄


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no sorry the doodled diagram has a problem...well two....possibly three... don't quite know where to start...and as i'm uncertain just what you want to do here i hope you can elaborate on that.
I have guitar amp heads that have 4ohm, 8ohm, and 16 ohm output transformers only. I have two separate speaker cabs that are both loaded with a single 8 ohm speaker each. I would like to be able to use a single cab at 8 ohms. That’s no issue. I want be able to add the 2nd cab either in series or parallel to the first to get 4ohms or 16 ohms to use the other two heads, but I want the first cab to always be connected to prevent a no load situation.

I do not want to use a toggle switch as that is just something that ends up getting broken. I do not want to use a switched jack as they have a tendency to fail.
 
no sorry the doodled diagram has a problem...well two....possibly three... don't quite know where to start...and as i'm uncertain just what you want to do here i hope you can elaborate on that.

That's actually really easy. Look up what impedances your amp can handle and then connect your speakers in parallel or serial or a combination of both that result in an impedance the amp can handle. Use Ohms law, an online calculator or what the amp wiring diagram suggests. It's really easy, your amp can take a higher impedance without problem but you'll have serious problems if the lower impedance range is undercut.
 
That's actually really easy. Look up what impedances your amp can handle and then connect your speakers in parallel or serial or a combination of both that result in an impedance the amp can handle. Use Ohms law, an online calculator or what the amp wiring diagram suggests. It's really easy, your amp can take a higher impedance without problem but you'll have serious problems if the lower impedance range is undercut.
Yep. I’ve ran higher impedances before and they tend to sound like thin shite. I never go more than one higher, so a 4 only goes to 8 and so on.
 
Why don’t you use 1/4” plugs on both positive and negative and just do the connections with your cables? Just put four 1/4” jacks on each speaker. Make a bunch of 4 and 8 foot cables and you are all done. Just make sure your impedance matches before you turn your amp on.