Bivariate model for ordinal and continuous data

I would like to run a bivariate model for an ordinal variable and a continuous variable. The ordinal variable was measured in childhood and the continuous variable was measured in adulthood - therefore it makes sense that I should use a Cholesky decomposition testing whether the ACE influences on the ordinal (childhood) variable also influence the continuous (adulthood) variable. However in a liability threshold model for continuous and ordinal data, the ordinal variable should go last. This results in a test of whether the ACE influences on the adult continuous variable also influence the childhood ordinal variable (not what I am interested in). Is there a way of testing the former in a bivariate model for continuous and ordinal data?

Many thanks.