PCB assembly work for more than 5 years:
in normal standard, the following step for pick-n-place and the following procedule:
1. high speed PNP for resistor and capacitors.
2. low speed PNP for IC and SMD connector
3. one worker for manually placing some components , for these can not be place by machine
4. one worker for checking
5. reflowing...
6. one worker to check the PCBA, if there any abnormal.
7. visual checking
8. other processing such as THT soldering.....
so your connectors will be placed in the step 3.