Need Advice on Sub Wiring

[TheEarthquakeMaker]

Hello humans,
I'm building myself a home audio subwoofer as a hobby project. I built & designed the cabinet, bought an SPA1000 plate amp, and two Alpine X-W12D4'S. I'm buying a second amp so each sub will have its own plate amp, two isolated chembers, each with a down firing bass radiator.
Hence the name Earthquake Maker.
My problem is that I've lost the "series jumper" that came with the subs, which means I need to bridge two terminals, no biggie, but I don't know for sure which terminals are for which voice coils. My amp can only run at 4 or 8 Ohms, so I need to wire it up in a way that will put an 8 Ohm load on the SPA1000.
Can anyone tell me which terminal on the Alpine X-W12-D4'S is for which voice coil ?
Or a step further, tell me how I need to go about wireing up a 4ohm DVC Sub to a mono chanel amp, so that it puts up an 8 Ohm load on the amp ?
I've drawn up the way I THINK it probably needs to be wired, but I don't trust myself, nor do I know what exactly those "series jumpers" actually did, so I'm not sure if I could damage anything if I get it wrong. Please have a look at what I've come up with and please let me know what you think.
Any help would be super helpful. Thanks in advance for any help that might be offered.

 

[TheEarthquakeMaker]

Update, this (on the right) is the wiring diagram from Alpine, that explains how to set up the amp, so it utilities both voice coils, and puts an 8ohm load on my amp. But it only explains how to do this using the included "series jumper" which I've lost. So I need to figure out what connections that jumper was jumping, so I can wire it up safely, and, properly.
Please help

 

[NINaudio]

The drawing you posted has the wiring connected right for an 8 ohm (series) load. In order to get a 2 ohm (parallel) load you'd have to connect the positive terminals to each other and then the negative terminals to each other.

Your question of which voice coil is which in your drawing is wrong, but I'm assuming that with the diagram from Alpine you can now figure out which is voice coil 1 and 2. Just as a note, if the voice coils were arranged as in your drawing AND you connected it that way, all you'd be doing is powering voice coil 2 and bypassing the first one.