I already know how to plot the predicted probabilities of binomial models without any interaction terms:

predicted logit = a + bX

predicted probabilities= EXP(predicted logit)/(1+EXP(predicted logit))

What I needed to know is how to do it when the model contains an interaction. For simplicity's sake the model we're talking about has only one IV (scale ranging from 0 to 10) and one moderator (ordinal ranging from 1 to 4), which means obviously the interaction is between the two of them. Which equation should I follow to plot the predicted probabilities graph of this interaction?

Thank you for your help.