How to roatate the full assembly by 90 deg. Like below image

Alt key + left arrow, repeat 6 times.

Once done, hit your spacebar, then the 'New View' button and name the view.

You can use mouse or keyboard to rotate the files as you want.

If you need the view orientation to change, then you can set the assembly in required position and overwrite the views.

If you don't want any of above then you need to mate/place them accordingly.