1. If you have multimode modules, you must use multimode cables (OM3 is an aqua jacket or OM4 is an violet jacket).
Yellow cables are singlemode. You can't use a multimode transceiver on single mode fiber optical cable. Large optical loss will occur if a multimode transceiver is connected with single mode fiber.
2. Your modules are multimode dual (Duplex) so you must connect both cables. You can use single (Simplex) cables but you must connect them crosswise
In your case, you need to buy one of these cables.
If the fiber optic connection works, the green FIBER LED will light up.
The 100M LED is on properly because the R26 network card speed is only 100Mb/s