Thanks for the input.

Tapping a hole refill and put a plug screw in can be a concept.
Is there way to refill with the existing pin hole?
In the pics you see my syringe with a long needle. With the other instrument I could press down the metal strip that pushes the pin up in case this is locking the hole.
Do you see any chance to fill this way?

How viscous is 10000 Toyota silicone? Is it like grease or like gear oil?
I am asking in order to find out it I could use some silicone o-ring seal lube I have, but this is very viscous. If I turn the bottle upside down it takes around a minute unit reaches equilibrium, it is so viscous.

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