I had a BARROWCH (not Barrow) temp sensor that looked similar to this. The temp sensor is designed to run off of a fan header, 3 pin or 4 pin.
HOWEVER, the BARROWCH temp sensor needed 12 volts all the time. I burned up two when my BIOS defaulted back to factory and switched the fan header back to 9v.
A direct 12v feed from molex or sata would be safer if you do not have a header that defaults to 100%.
The other fitting is to hook up to the Barrow RGB board. This must be a Barrow specific feature.
Not sure why you need it because I did not see where RGB was used on this sensor. The display is powered and run off the temp sensor body.
Please note that there is no temp output on the temp sensor, only the display is used. Otherwise there would be a 2 pin 10K female end available to hook up to.
Build: msi C8r (Carbon8r)
Core i7-9700K OC 5 GHz, MSI Z390 GAMING PRO CARBON Mobo, AMD Radeon VII GPU OC 2K MHz, Corsair Vengeance RGB 32GB DDR4-3200 RAM, Phanteks Enthoo Pro M SE ATX Case.
XSPC RayStorm Pro CPU w/b, Bykski Radeon VII GPU w/b, EKWB 140 Revo D5 Pump & Res.
Aquacomputer Aquaero 6 LT USB Fan-Controller, Vision Touch and 'High Flow' Sensor.
(2x) Hardware Labs Black ice Nemesis 280GTS XFLOW radiators and (1x) Alphacool NexXxoS XT45X-Flow 140 in full push/pull.