I just got some APC Tails, and I was wondering what these 2 holes are for. One looks like something plugs it up, but a bulb wont fit into it. And the other hole is about 2-3 cms in diameter and it has a black piece of tape over it ( maybe its a breather hole? ) But I was wondering what goes into the bigger hole, and do I take off the tape over the small hole?
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