It will be a sticker on the right side, unless it is an early CP3, which may not have one. It will be GTOCP3-xxxx.
Phone: 815-222-6538 (direct line)
Phone: 815-282-1513 (office)
From: firstname.lastname@example.org <email@example.com> On Behalf Of steve711614 via groups.io
Sent: Tuesday, January 19, 2021 4:38 AM
Subject: [ap-gto] Gtocp3
Hello I am trying to find the serial number of the cp3 controller box