I just realized I posted the wrong pic, but you are correct gobraves. pos to pos then to a pos terminal, neg to neg then the matching a neg terminal. That should give you a 2 ohm load at the amp.

There are two sets of terminals on the to add in more wiring options. You have d4 subs now. With this style you can add 2 d4 subs to the same amp, instead of either needing to replace the subs with d2 coils or getting a new amp.