Thank you for your contribution Markoz, but I think that mllgrennman refers to Simufly CIVA INS, isn't?

In that case:
- Autopilot Mode Selector should be in MAN position
- Autopilot HDG Switch should be engaged
- Autopilot Navigation Source Selector - pos A
- Heading Bug on Captain's HSI will be controlled by CIVA-INS

In both cases (Simufly CIVA INS and CS CIVA INS), you have to align them to 0 in chocks without any movement.