You need a breakout board like one found on Amazon.
https://www.amazon.com/dp/B00B9GFJAU?ref_=ppx_hzsearch_conn_dt_b_fed_asin_ti tle_1


With this you connect the wire from the float to the BO board and the BO board to the PLM-ADIN card. We explain how to set this up in the ProfiLux here in this article:
https://www.aquariumcomputer.com/kno...immer-control/