thetford wireing problem help needed

hi have just purchased a motorhome with a thetford 200 s/cs cassette toilet and found the wireing disconected from the mains and pump can anyone explain which wire goes where here goes for description: there is a block connector with 4 wires 1xred 1xblue 1xblack 1xwhite/black and next to it is the pump with x2 spare spade connectors, the block connector with 4 wires on runs upto the flush button? have pics but dont think i can upload them 1 st time on site, have looked on web and unable to find any info any help would be great many thanks peter