line-in

I picked up this decent little Sanyo as a beach boomer for my ipod, but can't figure out how to get the line-in function working... thought for sure it would work since it has the input but there's no selector switch... just me or is that kinda weird? Anybody familiar with these and have a clue...

I posted this thread a while back: https://boomboxery.com/forum/index.php/topic/15536-the-dead-horse-that-is-line-in/?hl=%2Bdead+%2Bhorse , and after doing so, I thought, "There's got to be a simpler, cleaner solution." Turns out, there is... and it's quite possibly one of the simplest mods. So...