2008 210 factory speaker setup wiring questions

[gee]

I have the factory setup in my boat. CMD5, 1 Clarion AP480, 1 Clarion AP280, 4 6.5 polks, and 4 6x9 polks on the tower, 10inch Sub in I assume a factory enclosure (round plastic box). I don't have cooler door. Just wondering the best way to set this up.
This is how it was wired up when I got it. Currently have the four tower speakers going to the 280. 2 to each channel, sub going to channels 3&4 on the 480 and four boat speakers going to channels 1&2 two to each channel.
The way the RCAs are wired up is the rear going to the AP280 and the front going to the AP480. Is this correct?
Is their a better way to wire it up with my existing hardware.

[gee]

Also I only have two sets of wires (4 wires total) coming down from my four tower speakers so I assume wired up for a two ohm load

[Mikeski]

best upgrade you could make would be to replace the sub enclosure with the vented unit from earmark, and vent the space where it is installed. Not much improvement available from wiring changes to your current gear.

[TxJole]

I have an aftermarket sub with no door and no vents and it's a dog compared to my BILs older less power vented sub. A good vent is on the list this off season. I have plenty of power 2 sync 6 and a nice wet sound sub and it just shakes the seat.

[gee]

Thanks for the replies.
So I did some searching on heare and set crossovers hp 80 for boat and tower and lp 80 for sub, reset gains and I'm pretty happy with the end result. Now to water test on the weekend. Things seem to sound different on the water
I'm in Australia so Earmark is out. Have to find model/specs for the sub and try and source/make a sub box and vent the port locker. I have a long brown plastic box as my current sub enclosure I see most 08 210s have a white more box shape one. Does that make any difference. Could add an old car amp I got laying around and move the four boat speakers onto it and move the tower speakers onto the 480.
Do you think that would be a worthwhile improvement?