Oil Problem With York!??!!

Ok, i just got my york installed on my 4.3 s-10. i've got custom brackets, no stock A/C, a dryer, pressure switch and everything the right way. but my big question is that i've got it mounted on it's side, onboardair.com siad you can as long as the inlet in on the bottom. so i did that but now the oil plug on top is sealed , i got it out of an old ford, but the other side that's on the bottom has a bolt that i can take out to drop in my dipstick and fill it. but also there is this long bolt like thing on the back side taht is about the same size, can i fill and check my oil from there and if so how do i do it? on other question is, i filled it up with about 7 oz. of 10w30 oil thinking there was still some in it, but my water trap was full of oil after about 20 minutes of driveing around? so now i'm scared if it has enough oil cause there is no way of checking it without taking the whole thing back off. i also don't know what they are supposed to sound like cause it's a lil bit loud but i'm not sure if it's normal to make some noise or what? sorry about being so long, i just need some help so i dont' burn this thing up after paying for it all....

Thanks guys