Questions about my oil pressure gauge and feed line

[OregonNed]

Hey guys, I am hoping you can help me out on a couple of questions. I am working on getting all of my factory gauges reconnected and working again. When I bought my truck, the temp gauge, ammeter and oil pressure gauges were all disconnected. I'd like to get away from the three-gauge panel under my dash for a more stock look. Anyway, I have ordered a kit to convert the ammeter to a volt meter. Also, I have bought a new temp sender from Lectric Limited, I believe it is, and the wiring kit. The oil pressure gauge is next to look at. The needle is sitting at the half way mark, and if I gently move the needle, it is stiff either way. Is that normal? Or would a working gauge "zero" out without oil pressure driving it? And then lastly, does it look like I am missing anything with the mechanical line connection? Is this how it should be connected with my copper line kit? Thank you very much! Ned