Hi,
Please maintain proper subject line.
Can you please explain your requirement in detail.
As per my understanding you want to install the Datasource (FI & LO) in ECC and move it to target( BW) system.
If this is your requirement go to RSA5 in ECC(R/3) side and select your required datasource and install it. Check those installed Datasources are available in T-code RSA6 or not.
If it is available then login into BW side and go to RSA1 and go to Datasource, Select Source system and Select the Application component where your repective Datasource available( which you have installed in ECC side). Right click on Application component and Say replicate Datasource.
Or else Go to RSDS and give Datasource and Source system details and select Datasource from top of menu select replicate Datasource.
Pls refer http://help.sap.com/saphelp_nw70/helpdata/EN/43/5fc0680a876b7de10000000a422035/content.htm Datasource replication details are explained here.
THanks
Aakash