3-pin motherboard Jumper

Fitz_24

Honorable
Sep 23, 2012
20
0
10,510
I have a ACER Aspire M1640 PC. I took jumper off to clear CMOS, not realising it's a 3-pin post on motherboard (near CMOS battery); now I don't know which 2 pins I should replace jumper on for normal PC use. Can you please help.