I have an L2500 as well and I have the same issue finding that sweet spot on the transfer case to get it into neutral to get it to start.
To remedy this it is actually really simple. When in neutral it presses a plunger which is the safety switch. All I do now is just keep it in gear depress the clutch and push in the safety switch with my hand while in the seat. It's actually really easy once you figure it out.
Set the parking brake and then visually move the transfer selector into the H-L and N pos. The N position depresses a small metal bar. Thats the linkage to the safety switch at least on the L2500 gear transmission anyways. This will give you quick idea of what to look for when from the seat.
My tractor is a '96 so I can't assure that the linkage or the safety switch has changed or is different but it is something worth looking at.