first line in Ultimaker Cura

Dear Friends,
i started to use Cura (5.1.1) to get my gcode for my 3D-Printer.
So far it works as expected.
Only the damn it starting-line, I don't know how to change it.
For explanation, i mean the very first line, which only cleans the nozzle.
I have some gcode where it's at the outside, but I don't know how to set it in Cura.
Right now, it's almost in the middle (as you can see it in the attachment), but as you can image, I need it at the outside.
Thanks for your help,
Accepted answer

I'm still using 4.4.1 but yours should be similar.
Go to "Preferences", "Configure Cura", Then select "Printers".
Select your printer then press "Machine Settings".
At the bottom you will see your start and end G-code.
My start code looks like this for comparison:
; start_gcode
M117 Start Clean ; Indicate nozzle clean in progress on LCD
;
M104 S{material_print_temperature_layer_0}
M109 S{material_print_temperature_layer_0}
M109 R{material_print_temperature_layer_0}
;
M107 ; Turn layer fan off
G21 ; Set to metric [change to G20 if you want Imperial]
G90 ; Force coordinates to be absolute relative to the origin
G28 ; Home X/Y/Z axis
;
G1 X3 Y1 Z15 F9000 ; Move safe Z height to shear strings
G0 X1 Y1 Z0.2 F9000 ; Move in 1mm from edge and up [z] 0.2mm
G92 E0 ; Set extruder to [0] zero
G1 X100 E12 F500 ; Extrude 30mm filiment along X axis 100mm long to prime and clean the nozzle
G92 E0 ; Reset extruder to [0] zero end of cleaning run
G1 E-1 F500 ; Retract filiment by 1 mm to reduce string effect
G1 X180 F4000 ; quick wipe away from the filament line / purge
M117 End Clean ; Indicate nozzle clean in progress on LCD
;
M117 Printing...
; Begin printing with sliced GCode after here
;
These are the specific lines that tell it where to clean and prime the nozzle:
G0 X1 Y1 Z0.2 F9000 ; Move in 1mm from edge and up [z] 0.2mm
G92 E0 ; Set extruder to [0] zero
G1 X100 E12 F500 ; Extrude 30mm filiment along X axis 100mm long to prime
Make sure the origin is not set to the center in the printer settings shown just above the G-code.
Hope this helps.