Need a little info on wireing on a 115

I picked up a used 1994 115 Pro-V to swap out with my 90 yamaha.My question is where the main harness plugs into the control harness(see pictures) there is a couple of extra wire plugs my 90 didn't have.The other thing is the 90 had the oil tank under the cowl,and the 115 has a remote tank.The xtra 4 pin plug goes to the oil tank,and i have that harness.There is another plug that is a 4 pin connector,but only has 2 wires in it and they are green/red stripe and green/blk stripe.Does anyone know what they go to? I am thinking possibly for the yamaha tach with oil gauge but i don't know.The other wire is gray/black stripe that goes up to the ignition box.What does it go to,or what does it do? The last question is on the trim sender wires there is an orange wire comming out of it,What does it do?Thanks for any help you can give me. http://www.bassboatcentral.com/smileys/thumbsup2.gif
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