Contrary to Feature 92 "Subject relative clauses", in direct object relative clauses it seems that only lo que and i can be used (that is, the other construction ke is probably never used). Additonal research is needed (and special care is to be taken that code switched Spanish segments are not confused with Palenquero, as this will confuse the issue).
Source: de Friedemann and Patiño Rosselli 1983: 177
Source: de Friedemann and Patiño Rosselli 1983: 177