John, I had no instructions here either, pretty simple goes on one way.
I removed the pins on the bucket cylinders (toward bucket) and propped them up with a block of wood so as to get the large plate with the hose slots over the crossmember, I needed to clean out grease holes in pins anyways (might be able to go from underneath with FEL up in air without taking cylinders loose) Once I got the larger piece on I reattached the cylinders and raised the FEL so I could work on the part better, about shoulder height, made it easy to hold "C" part by myself and insert the blots and other parts.
The "C" channel goes facing cup inward (mine had notches for a front grill guard they line with the notches in larger piece), the long flat spacer piece goes on bottom, the 2 smaller flap pieces go between the "C" channel and the crossmember there are notches on each end of the "C" channel to accommodate the tongue of the flap parts, there are 16 bolts that are the same and 4 different with smaller heads, those along with nuts on each go into the "C" channel where the 4 blot holes are in the bottom of the "C" channel, they are a tight fit almost think they are wrong size, I think they did that to make sure there is a resistance on them (I tightened them by hand, they are hard to turn, you can feel when they actually bottom out on the plates), the other 16 bolts with lock washer (tightened them with impact) and nuts go into the other holes. I put the "C" channel in and used a bolt on either side at each end to hold it left nuts loose, dropped one end down slid the flap piece between "C" part and crossmember tongue down, replaced bolts then did the same on the other end. Tighten all 16 then tighten the 4 last is what I did. YMMV