The large terminator on the left is the 10Base5 terminator.
You may (and will) also need:
Fan-Out Boxes (15 Pin connectors) or
10BaseT hubs (RJ45 connectors) or
Repeaters (with
BNC, DIX, or RJ45 connectors.
These devices allow you to connect multiple workstations using a single connection (transceiver) to the 10Base5 cable.
A 10Base2 Segment requires at least:
Now, you would connect the segment of 10Base2 to a repeater (which is connected to the 10Base5 COAX), or external transceiver (on the 10Base5 cable).