Mole sauce without chocolate?
Mole is often made with unsweetened chocolate or cocoa powder. No added sugars are involved. (There is a tiny amount of natural sugar in the cacao, about 1%.)

Chocolate is not absolutely necessary in mole. Mole verde generally does not contain chocolate; some recipes for mole rojo also leave it out. You could simply leave out the cocoa from a mole recipe, if you wish.

But you don't have to simply because you're diabetic. Seek a recipe which uses cocoa rather than Mexican chocolate; the Googles are full of such recipes.