u/Hefty_Pack_4315

I am landing from an American Airlines flight at gate 46C. I have a flight to Singapore as my next flight but the two tickets are booked separately. Do I need to go through check-in counter again or can I just go through transit? I have no checked baggage just my carry on. This also under the assumption I get the boarding pass online through Singapore. And if I do need to go through check-in counter again what signs do I follow because usually you follow the transit signs and there won’t be any check in signs near the arrival area so do I need to follow exit signs or something like that?

Edit: thank you everyone so much for the help I really appreciate it.