TCM surround system 120 W artic 204476 (just 5 small speakers, no remote control, no bass speaker)

In this set of 5 small speaker I found the receiver RX702 which was welded to CN703, which actually was missing. I don't understand such a change.
The five small speakers have the following acronyms:
77D2G13 8 Ohm 20W Samco 11H2F and 77D2C36-1 8Ohm 20W Samco 11H27.