Solder Cup Connectors and Terminal Pins | Mill-Max Mfg. Corp.
20pcs Spring loaded connector 3 Pin Pitch 2.54 mm 8.0mm Height Horizontal PCB Angled 90 Degree Through Holes 1 Amp Current Pogo|Connectors| - AliExpress
Pogo Pin Probe Clip - 6 Pins with 2.54mm / 0.1 Pitch : ID 5433 : $10.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Pogo pin - Wikipedia
Solder Cup Connectors and Terminal Pins | Mill-Max Mfg. Corp.
10 pcs Male Female Header Spring Pogo Pin 3 Pins Grid 2.5mm PCB Single Row 5.5mm Height SMT Right Angle Target Connector 3.5mm|Connectors| - AliExpress
Understanding which components to use
Amazon.com: Dr. Pen Ultima M8 Professional Microneedling Pen - Electric Auto Derma Pen Skin Care Tool Kit with 6Pcs Cartridges 0.25mm (2x16 pins + 2x36 pins + 2xNano) : Beauty & Personal Care