Hi, I got a no-name starter battery (BulletBatt) “gifted” from a buddy, should be quite right, because my just 2 year old Varta Blue Dynamic (was probably one year at the dealer (NOT Internet!) weaked, production date 2015) and the tester also shows “replace”. Anyway, the BulletBatt seems to be still in good condition according to the tester and is currently attached to the charger for reconditioning. After the procedure I would like to after the electrolyte t see, the battery has cell plugs, but without a slit or cross, but just smooth! How do I get them? I tried to grind it in with a suction cup to the valve, which “slips” through… Next idea would be with a Dremel either to mill a slit in or to make the cell plug turner on the front with a hot air dryer and then melt a slit in.