Building the bike up with shimano dura-ace di2 and hydraulic disc brakes.
Step 1: Install Rear Derailleur
Step 2: Front Derailleur
If you're running 2x you need to install the front the derailleur hanger that comes in the spare parts kit envelope.
Keep the front derailleur to hanger bolt loose for now. You'll tighten it down once you have the cranks installed and can position it correctly.
Step 3: Route Rear Brake Line
Route the hose through the down tube and under the bottom bracket area. It's super difficult to get it through and down the chain stay. Poke a sharpened spoke into the stop, place it in the center of the hose, and guide it the rest of the way through.
Step 4: Battery and Junction Box
Push the battery into the top tube from the top of the head tube.
Tape the end of the string inside, near the top.
Step 5: String the Rear Derailleur Wire
Step 6: Install Seat Post
Line up the grooves on the seat post clamp by either tightening or loosening the bolt. Loosening the bolt makes the two smaller triangles (top and bottom of assembly) slide towards the longer side of the middle trapezoid piece - effectively make the assembly taller.
Warning: be sure to stop loosening the seat post clamp bolt as soon as you feel the torque drop and you are able to move the seat post. Continuing to loosen the bolt will expand the clamp enough to press on the top and bottom of the top tube - potentially cracking, or even worse, punching a hole through the carbon.
Drop the clamp into the frame.
Step 7: Install Fork
Install the upper and lower cups into the head tube.
Install fork I to head tube. Hold it I. Place with the stem until you figure out the steer tube length.
Step 8: Install Bottom Bracket
Step 9: Install Junction Box at the Stem
Step 10: Hydraulic Brakes
Slide the bolt and olive onto the line.
Tighten down the bolt on the shifter and caliper.
Step 11: Seat Clamp
There are two inserts that slide together to make the seat to post attachment.
Push the first one into the seat post, and then the inner insert into the first.
The seat level adjustment is done by rotation of both, or one insert, to get the correct seat pitch. The larger insert has 1 degree of adjustment per tooth, and the smaller insert has 0.5 degrees of rotation per tooth.
Torque to 7 Nm maximum, and follow this strictly so that you don't strip the bolts. Be sure to alternate side as you increase torque. This will ensure that the insert is centered.