Thetford Marine toilet for camping Porta Potti ele

As far as I am aware, this has never been used. We bought a used Sportsmobile van, and this came with it. We removed it and built a composting toilet. (The person who owned the van before us was an elderly man who used it for traveling and not camping, and it seems as though none of the camping equipment had ever been used, including the stove, fridge, and this Porta Potti.