https://www.instructables.com/Lexus-RX300-Aux-In/
Lexus RX300 Aux In : 11 Steps - Instructables
Lexus RX300 Aux In: This Instructable will show you how to add an AUX In for your 1999 Lexus RX300. I'm not sure of the compatibility to other models or years...
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https://cnanma.en.made-in-china.com/product/HyuxGZbjlvhc/China-Single-FM-SD-Aux-in-DVD-Headrest-Car-DVD-Player.html
Single FM/SD/Aux in DVD Headrest Car DVD Player - DVD Headrest Car DVD Player and DVD Car Player
Single FM/SD/Aux in DVD Headrest Car DVD Player, Find Details and Price about DVD Headrest Car DVD Player DVD Car Player from Single FM/SD/Aux in DVD Headrest...
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https://www.instructables.com/Boom-Box-Aux-In-Mod/
Boom Box Aux in Mod : 5 Steps (with Pictures) - Instructables
Boom Box Aux in Mod: We are going to modify an old boom box (AM/FM/CD/Tape) to add an aux in cable so we can connect an iPod or phone to it. I'm using a Koss...
boom boxaux inwith picturesmodsteps