I think it depends on the statistical package you use (you say “execute”).

Have a look at the following readings:

Marsh, H. W., Wen, Z., Nagengast, B., & Hau, K.-T. (2015). Structural Equation Models of Latent Interaction. In R. H. Hoyle (Ed.), Handbook of Structural Equation Modeling (pp. 436-458). New York: The Guilford Press.

And

Marsh, H. W., Wen, Z., Hau, K.-T., & Nagengast, B. (2013). Structural equation models of latent interaction and quadratic effects. In G. R. Hancock & R. O. Mueller (Eds.), Structural equation modeling: A second course (pp. 267-308). Charlotte, NC: Information Age Publishing, Inc.

In the second reference, the authors provide a LISREL syntax for latent interaction model.

Good luck!