I have an athlete who has built up her bike and has some bits left over. Aside from the extension cable plugs. Can anyone identify the rest?
Top right look like handlebar shims. Top looks like a seatpost or headset shim. Thing on left looks like end caps for aero bars where the shifters go
I have an athlete who has built up her bike and has some bits left over. Aside from the extension cable plugs. Can anyone identify the rest?
Most are Shimano Di2 kit parts. Upper right are drop bar ends for use with the EW-RS910 bar end junction A. The black square in center bottom is the bar end blank for the non-junction bar end. Segmented rubber strip also goes with bar end junction kit.
The two sleeves at upper left along with bag of thin washers at bottom are for mounting internal Di2 battery in a seatpost.
Small black plug below bar ends is Di2 junction box port plug.
White cylinder with o-ring at middle right is Shimano hydro shifter bleed port extension for Shimano’s bleed funnel.
White y-shaped bits look like Shimano hydro brifter lever shipping wedges.
Don’t know about small plugs, circular black part left of bar ends or the labeled black part.
I have quite a pile of leftover parts from my Speedmax SLX Disc too. I was alarmed at first but everything works! 
That’s great, thank guys.