How to enter z with negative exponent in the numerator of a discrete transfer function in simulink plant block

I need to enter the following discrete transfer function in simulink. My problem is with the negative exponents of z in the numerator.

1.026e-05 z^3 + 1.638e-06 z^2 + 5.248e-12 z + 6.787e-32

z^(-3) * -------------------------------------------------------

z^3 - 0.0003158 z^2 + 1.027e-23 z - 3.102e-44

Answer 1

[Renato SL]

Maybe you can use a Delay block (documentation here).

The blocks would look like this: