No Worries Jim,
There is no harm in leaving it the way it is and at the end of the day if you don't do extended free camping with very short periods in between where you need to charge the batteries from 240V it doesn't really matter,, It just means that by using a 10A Charger it will take very long time to fully recharge.
If you wanted to leave the SETEC in to power accessories but not charge the batteries because you will install the IC2500 then it is simply a matter of doing the following.
Connect IC2500 directly to batteries - Positive on one battery and negative of the other.
- When connected to 240V make sure that your battery switch is turned Off - This will let your IC2500 Charge your batteries and your SETEC will act as a 12v Transformer providing 12v power to your toys.
- When not connected to 240V and Camping, turn on the battery switch - now your setec unit will act as a pass through and provide 12v from the batteries to the toys.
- When driving you can also leave the switch on and the setec unit will act as a dcdc charger and provided some charging to the batteries - To fully recharge the batteries (210AH) using this setec in this way though you would probably have to drive interstate
Hope this helps