Moderating variable

[Deepak Dass]

I am working on a model in PLS-SEM where I have a moderator variable that is hypothesized to moderate two different relationships between two mediating variables and the dependent variable (DV). Specifically, I have the following:

Mediator 1 (A) influences DV (D).
Mediator 2 (B) influences DV (D)
Moderator (C) is hypothesized (Theory) to moderate both of these relationships.

I want to know how to correctly model this in PLS-SEM, especially when dealing with interaction effects. Is it possible to use a SINGLE moderator for both relationships?
OR
Should I create two separate interaction terms, one for each mediator?
OR
Is there a better approach to modeling this scenario?

Additionally, I would appreciate any suggestions on whether to test these interactions separately or combine them into a single model. Would multicollinearity become a concern when testing two interaction terms simultaneously?

Thank you for any insights!