Changed complete car camera system now caravan camera doesnt work????

Caravan camera is a Safety Dave cam that came with the caravan that was bought new in 2021. Recently I changed my car camera system (4k 1080P cams) and now my caravan camera doesnt work or perhaps not compatible. Im not sure what type of camera was fitted to the van. Sounds like I need to replace camera? Would that be right and does anyone know what type of camera the Crusader factory wouldve fitted in 2021?????

Thanks (in advance)

Ian

Are the two units operating on the same frequency?