Originally Posted by texbazII

Thanks cj3209 appreciate it. The component under the stem is a (3 port) Junction box A SM-EW90. Gets its power from the battery in the seat post. Your road bike depending how old it is might have a EW-RS910 in the handle bar. One suggestion, If you want Bluetooth and ANT+ com with your head unit like Garmin,wahoo,then you might want to start looking for a Shimano wireless module P/N EW-WU111 they are getting very scarce at the moment.

When I spoke to Lynskey and placed the order I asked about the junction box A and the D-fly module. Could I pay extra for the in handlebar junction box and the D-fly., they said they don't do either because the handlebars don't come with holes in them. Maybe later on I can upgrade the bars and incorporate the junction box.