3.5mm Tip/Ring/Sleeve Pigtail - 2 Pack

This 3.5mm plug-plus-pigtail is available as one of an identical pair from Amazon, at:
https://www.amazon.com/dp/B07Y8KGJKL?psc=1&ref=ppx_yo2ov_dt_b_product_details
 
It is a great way to wire external power of up to +/-15V to the Mic/Line Mixer, MLMHC01.