I hate the "fill kit" that comes with the SeaStar steering kit. I put one on my last boat, and it was a pain in the you know what. If you are just slightly low, I recommend using a "Injector" syringe. I have tons of them from the many bottles of "Cajun Injector" and similar seasoning mixes that you inject into steak, etc... Since I have a bunch of them, I just designated one as "hydraulic fluid", and keep it (cleaned off) in a bag in my garage, right next to the SeaStar fluid container (which by the way, keeping with my redneck ways - is kept in a Mason Jar, as it was much better than that flimsy plastic bottle the fluid came in):lol: If you need one of those syringes, and can't find one locally, I'd be happy to mail you one, as I have about a dozen laying around.
All the best,
Glenn