I have a Trendnet TEG 30262 with an SFP+ port. What type of cable would I need to connect it to the SFP+port on this NIC. Distance less than 10 feet?

You can directly purchase our Cisco compatible 10G SFP+ DAC cable to connect your Trendnet TEG 30262 and SFP+ port on the Intel X520-DA2 network card through https://store.10gtek.com/0-5m-1-6ft-10g-sfp-to-sfp-twinax-copper-passive-dac-cable-cisco-compatible/p-5819