Hooking up 2 dvc 4ohm sub to a series/parallel setup. What is the best way to connect both of the + wires together and both - wires together to run them to my amp? I have circled the joints that i question.
You should let us know what amp, because we don't know if the amp is 1 ohm stable or 2, but by the way you said series/parallel, I assume you want your final impedence to be 4 ohms?
The following 2 scenarios assumes that you have a 1 channel subwoofer amp:
If your box has 2 terminals on the back of it (1 for each woofer), then just connect each speaker to each terminal inside the box in series, and run 2 lengths of speaker wire coming from the amp going to each terminal on the box.
If your box has 1 terminal on the back (1 for both woofers) then you need to wire each speakers voice coils in series, then run both sets of wire from each sub to the single terminal inside the sub, and then you can just use 1 speaker wire from the amp channel to the box terminal.
But if you wire 2 DVC 4 OHM subs with voice coils in series and to the amp in parallel, it will present a final impedence of 4 ohms.