I have an L322 and recently added a Discovery 1 to the garage. Slowly tinkering with it and having fun. Today, I did a nice engine bay cleanse. I noticed something odd, a golf tee plugging a hose behind the windshield washer reservoir. I posted on a few FB groups and some thought it could be the headlamp washer fluid all the way to axle breather or cruise control piping. Wanted to post here for any feedback.

 

Both are good guesses and neither need a golf tee stuck in the hose. Remove the washer tank and you'll know.

 

recently did mine [changed a motor]it's no fun,looks easy , try using washer with lights on and see if water is spraying or using your rear washer button and see if fluid comes out,it'll point you in the right direction,btw I needed to replace my center pump so I walked in to an autozone with it and found one that the plug fit and I think it was only around 15 bucks as opposed to what an original would cost