Do i have to use Bellcranks before the control surface to keep tension off the servos??

Or can i run the cables directly from the servo, to the rudder, and Elevator, routed through the nylon tubes.

Ideally i would like to keep all my servos upright and just route the cables as you explained through tubing, for exits.
as i took into consideration the sideways force on the fuse as id rather not have that extra strain.