What is removed when Trike Kit is installed?

Picked up an 07 Silverwing. Found out that it had had a trike kit but when they took it off they didnt replace some parts. I had to buy and install a center stand but my biggest concern are the plastic protectors underneath. I have the bottom front but dont know what I am missing as there is nothing to fasten back of it up and also the whole area around the oil filter is open. I dont remember that being the case with the o4 I had

Partzilla.com

Partzilla.com

After bike has been run as non tilting trike----I would replace fr and rear tire with new----that can wear round.   Reason: tire run on trike are worn square---not nice for cornering.

The area under engine is open no cover there.  Parts diagram Easyrider posted #3 is front under cover looks like it attaches to lower side panels or this missing lower frame .  
Look at parts for the frame part #6 pipe.