Hi. I was following the instructions on “Neptune apex tutorials Part 9 DOS” to install DoS and DDR. I got the DOS tiles for the 2 pump outlets, DOS volume activity graph, but the switches associated with DDR optical level sensors are not there in the unused tile bin. I checked the apex system display to find out that the DDR is not attached to DOS. That is maybe the reason why the DDR fluid volume remaining indicator tile is not showing up on my dashboard. The DOS is at aqua bus address 4. I attached some screen shots for your review. Any thoughts? Pls advice. Thks in advance.