OR TOOLS - CVRP: how to limit change with initial routes

I have a CVRP problem, in which I will be using the initial routes option. The objective with this is that this initial solution is already optimizing the maximum load of the vehicles. However, what I would like OR Tools to minimize the distance of these routes, being able to intersperse between the vectors, values ​​that have similar weights, but that reduce the final distance. I would like to know if there is any way to limit how it can change my initial solution, because the objective is for the trucks to be at their maximum possible capacity, but also, with the shortest distance traveled. Being that it is allowed to worsen the load of the trucks a little, in order to reduce the distance.