How to route Stratix-10 E-Tile tx/rx_serial_data to SMA output pins ?

I have the Intel Stratix 10 TX Signal Integrity Development Kit. I am currently trying to use the E-Tile and verify its function.

I used different design examples as well as the provided Board_Test_System to base my scripts on. But so far it seems that the receiver is not working properly. I could verify that I get a signal on the oscilloscope from the TX.

Thats my setup:

1. Connect SMAA_TX to SMAA_RX via a suitable cable.

2. Open Transcivertoolkit and load example/and or own file

3. Use Adapation

4. Try to do PRBS test which always stops because of high error rate

5. Also, trying to take an eye diagram never works and always aborts.

I am trying to figure out where exactly the problem is. For example. The channel 4 and 6 are noted on the pin layout for the SMA connectors. What exactly does that mean ? Does quartus does the routing or do I have to select an 8 Channel E-Tile ? And how would I then connect those 8 Channels to my board pins ?