The developer “Noizirom” has created a new Hair engine for MB-Lab, something that has been in the works for a bit now.
This will add a “scalp” mesh that you can then attach curve guides for particle hair. Much like the older hair engine for MB-Lab. However with the curve guides it would be easier (in theory) for people to manipulate hair.
Here I have created a scalp mesh, then the hair guides and then moved one as an example. The scalp mesh would need to be manipulated to fit your character and then parented to it, but it should work seamlessly.
This is in the ‘dev’ branch of the MB-Lab GitHub repository for those that want to play with it.