Homogeneity

"When we have to deal with extended magnitudes, all the parts must be homogeneous with one another and with the whole. But in the connection of cause and effect homogeneity may indeed likewise be found but is not necessary, for the concept of causality (by means of which something is posited through something quite different from it) does not in the least require it." Immanuel Kant pg. 78

Kant is saying that cause and effect does not really have to be connected. But when talking about extended magnitudes those ideas should be connected through homogeneity.