Help please- adding links to my 43.5 8900 PO

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2017 PO with screws in the links by the clasp. I need to add at least two links. Bought the watch used. Watch came with 4 extra links/screws. Do I add a link on each side of the clasp?

Which screws do I remove? Is there a pin as well? I have one extra pin as well. I have tbe correct size screwdriver (tool nerd)

 
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Got it! Pins didn’t drop out. Used one of the extra pins to push them out. Added a link on each side, have two left. Micro adjustable clasp is nice!