How to use two animation blueprints in one vehicle blueprint?

Hi, I have two animation blueprints, one is parented as “Animation instance” for animating my plane’s wings with values etc.. and the second BPA is parented as “Vehicle animation instance” because it allows me to animate wheels of the plane. But we all know that vehicle blueprint allows only one BPA to be used for skeletal mesh.

So how can I somehow merge these two BPAs of different parents into one? AI suggest using “Linked anim graph” node to merge one animation blueprint into another, and applying just one animation blueprint in the vehicle blueprint instead, but his explanation is uncomprehend and can be false…