(pics)Help! waterneck coolant line where does this connect to or weld it sealed?

ASSISTANCE Hybrids & Advanced Aftermarket Engine Performance
1

I’ve seen pics on some blocks where they cut and weld this opening sealed. In an lsvtec (b18a1 bottom/ b17a head) does this need to be sealed? Otherwise where does this connect to?

Here’s a pic of it:

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3

hit refresh and it showed up for me. but i have no idea about your question. sorry