Electronic & Hydraulic Shifting (Di2, Ui2, customisations)

Ok, so if you purchase an internally wired Ultegra Di2 groupset from Merlin you get the following:

• 4 X EW-SD50 cables, from 300mm to 1000mm (these connect all components together)
  
• SMBR-1 battery mount+battery (for internal cabling,external mounting)
  
• Front and rear mech, left and right shifters
  
• SM-JC41 internal four port junction box
  
• SMEW67AE handlebar cable set including rear mech setup and battery warning light
  
  

Now if you wish to run the new Shimano internal battery you then need (I believe) the following:

• SM-EW90-A, junction box for shifters and charging point
  
• SM-BTR2 battery pack
  
• SM-BCR2 battery charger (and e-tube interface)
  
• 2 X EWSD50 to connect to the shifters (one to each side) as the SM-EW90-A doesn't have the inbuilt cables of the SMEW67AE
  
  

I don't suppose anyone with a knowledge of Di2 cabling could run their eye over that and confirm this?

If it is the case then I need an SM-EW90-A and 2 X EW-SD50, god-fucking-damnit.