I'm just going to slam dunk this one into the too hard basket. My lights are fine anyway. But, if they weren't, a couple of grand to upgrade to self-levelling and directional HID's would probably be quite reasonable. See, my Wife's new Astra RS-V had self-levelling and directional HID's as an option. At $2,000, I talked her out of it. Having driven the car at night on country roads, including in the rain, I'm now kicking myself. The stock lights are manually adjustable, but nonetheless pretty woeful. She hasn't complained, so I'm just going to let sleeping dogs lie for now, as it's only a town car for her.
As an aside, the Astra RS-V is a great little car and full of great kit. Goes really well too. I do like the touchscreen with Android Auto etc. But, TBH I don't know what all the fuss is about. It's really no great step-up from Mylink, which I've personally never had any issues with. Sorry, I digress.
OP, did you find where to plug the hose back in?