You can do this by simply switching around the connections that are listed in the node editor. Select the two solvers and graph them. You will see the connections from the objects to their solvers. Now, you just need to swap the connections from one solver, to another.
From the solver you want to assign to the rigidBodyShape, connect the following to the rigidBodyShape.
outSolverUpdated -> solverUpdated
outSolverInitialized -> solverInitialized
currentTime -> currentTime
startTime -> startTime
Then connect the following from the rigidBodyShape to the new solver.
outRigidBodyData -> rigidBodies[n]
Where n is a number that hasn't been used yet.
Imagination is more important than knowledge.