valve/wiring problem

I been having a leaking problem from one of my fill valves up front so i finally got around to taking it of and cleaning it, i had top take both of my valves loose on the front lft side because they were both bolted to the same mounting bracket but after i put it back together i forg9ot to note which wires went to which valve,i noticed on the valves (gc 450) they have 2 posts on the solenoid but neither one says positive or negative so does it matter which post the hot wire goes to and if not, does every valve have to have the hot wire on the same side( like if i hook up one valve with the hot wire on the left post does my other 3 front valves have to have the red on the left also??0 Reason i ask is it was dark outside i couldnt see anymore so i was like screw it ill jus put a red an black wire on each valve it should be fine, i went to go let it down an it was acting werid like the driver side wasnt dropping the same as the other side and a real werid high pitched ringing sound was coming from the bed of my truck for a second it took me a few minutes to find out what it was; it was coming from the tanks i dunno what it was but the hoses would vibrate like air was trying to force itself up back in the tanks, only did this when i went to raise the truck up and would do this for 5 seconds then quit