On the C-10 I dont put the screws in the tool tray. I dont disconnect battery -just pull the battery caps. A blue baby snot sucker is how i add and level water- when stuck in to correct depth it will fill then suck the over fill out.
Battery tender and correct water level will extend battery life IMHO
I add acid the first time I top off a new battery.
My 05 is still on the original battery. Now you know it'll die tomorrow