There should be adjustment access screw. Pull cart up to garage turn lights on see where there shining on garage door kinda hard to do with tires on I remember you can crank tires on way or the other to access adjustable screw with short Phillips screwdriver. At least that’s’ how my 2012 cart headlight buckets are. I think the headlight fixture can be installed up side down? If so that would make the adjustment way too high?
https://www.youtube.com/watch?v=fkWKsF0oATs