If you would like U2000 manage the N2510 alarms and the U2000 works as Third-party NMS.
U2000 dont support to receive the alarm via SNMP as third-party NMS.
You need to use your own NMS to receive the alarm. This is the link of SNMP of N2510:
https://support.huawei.com/hedex/hdx.do?docid=EDOC1100030144&id=cfg_n2510_0443&lang=en
If you need to develop the NMS to connect the N2510, please see the document.