Heater Hose Pipe on Water Pump Frozen and Coolant Filter

Hey Y'all

Doing an entire coolant system. Thermo, hoses, flush, pump and also putting on a coolant filter. First question is what am I missing about removing the heater hose pipe thats connected to the water pump. It is completely locked in place, trying to remove it to put it on my new pump and having no luck. Second, my new pump has a plug in it right now where the pipe would seemingly go, but that too looks like it's covered in sealant and is locked in place to. lol Feels pretty dumb asking this but kinda blowing my mind right now.

Third question is setting up the in flow and out flow of the filter system. Do I just splice the line that connects to the water pump hose fitting and have the outflow going towards the water pump? I'm assuming that is how the flow goes but I just want to confirm.

Homedepot

Most people just splice into a heater hose for their coolant filters. At least that's what I've seen.
That fitting isn't that difficult to remove, even if it seems to be frozen in place. Lay the water pump on the ground with the gasket side down. Use the old fashioned double wrench method (poor man's cheater pipe) or a B F H on the end of a wrench that has it's box end on the hex part of the fitting. That's my preferred method. The absolute best way is to break that fitting loose before you remove the water pump so that you have a large, heavy piece of cast iron to hold the pump for you.

Thank you! Will probably just go buy a new hose pipe like suggested, to no avail when I had the pump still on, even harder with it off.... hahaha

I'm looking for a diagram but cant seem to find the right one. Is the heater to water pump hose an outlet? So I would put the coolant filter outlet hose going to pump and the inlet to the filter coming from the heater? That is my assumption but would hate to do it backwards