I attached a link to the instructions regarding the Redarc RedVision Vehicle Management System # RED89FR. The system has 6 plug-ins for water level sensors; it accommodates 2 to 5 pin sensor plugs. I am not sure which sensors you are plugging in, but feel free to send a photo and more information regarding your sensors and I will verify how they should be installed.
I reached out to Redarc for more information and this is what they told me regarding sensor installation:
RedVision is directly... view full answer...