Help Needed: 1994 4.3 tks V-6

[fort4short]

I own a 1994 4.3tks V6 mercruiser, I am wondering if I got all the drain plugs, I pulled 4 blue ones. 2 on the block 1 per manifold. I also disconnected all cooling hoses and left off. Did I miss anything? I also poured anit freeze through the thermostat housing and lit it run out the block drain. should I be ok for the winter? also any idea where the oil filter is located for this engine? I can not seem to find it.

Thanks