Starter is the pain in the hoop here due to access. Choices are limited. Either take the manifold off for more access or just whip out the battery, battery tray, dipstick and then the HCV (the easy way). All will pop off with out much fuss. Then it's flying blind as you'll have to feel what you're doing more than see.

If I was doing it again I'd have a telescopic mirror and also a socket or spanners with an adjustable knuckle to get the angle and prevent slipping when trying to undo/tighten it.