Just select the camera and guide scope combination in the alignment tab. The PAA will drive the mount and EKOS will take the captures required for the process.
ST4 is only used for guide pulses. Alternatively you can ditch the ST4 cable and send the guide corrections through the mount driver (select driver instead of On Camera). That method is called pulse guiding, and is usually preferred over the old ST4 standard.
INDI/KStars on Raspberry Pi 4, 4gb
Raspbian Buster with AstroPi3 script configuration
Skywatcher HEQ5 Pro Mount
Canon 600D Camera
Orion SSAG/ASI120mm @280mm Guide Scope
Waveshare Stepper Motor Board - DIY Focuser
Adafruit GPS Module
Generic Bluetooth Joystick.
Startech 7 port powered USB Hub.