https://www.ebay.com/itm/DIODE-ASSEMBLY-PAINLESS-WIRING/231337063377?epid=1717863983&hash=item35dcc373d1:g:9CcAAOSwUb5bmMdR&vxp=mtr

I saw this Painless Wiring diode, but it seems a bit pricey at $15 for what is a basic electronic component.