Servo function 73 and 74

Hello everyone

I have a herelink and a cube orange. I am trying to configure it in a way I can use it for skid steer. The problem is I want the throttle and skid steer feature both on the same joystick. According to the forum I need to set my servo as ‘ThrottleLeft’ and ‘ThrottleRight’ but I cant figure out how to do that. Right now the only way I can get an input from the herelink is using RCIN and I am using manual mode.

Please help me with this problem

I solved the above problem but new one arrived. whenever I disarm the rover . the motors start spinning in forward direction. I am using a herelink as my controller and have programmed one of its programmable buttons for arm/disarm.
Someone please suggest a solution