In order to use the SFP+ port in that router you will also require a 10GBase-T transceiver module. It does not appear to come with the transceiver included. To make use of these interfaces you will also need a CAT6 or CAT6A cable (decide depending on the performance requirements and distance of the run).
You should be fine with a CAT6 cable unless you are really pushing the distance or expecting full 10G speeds.
CAT6A 10GBASE-T up to 100m
CAT6 10GBASE-T up to 55m
Looking at NetGear's site they report that only fiber optic transceivers are usable with 10G speeds:
The following SFP+ modules are compatible with your R9000, R8900 and XR700 routers:
10GBase-SR SFP+ module
Avago. AFBR-703SDZ
Cisco. SFP-10G-SR
Finisar. FTLX8571D3BCV (1G/10G)
Sumitomo. SPP5101SR-GL
NETEGAR. AXM761
10GBase-LR SFP+ module
Avago. AFCT-7010SDZ
Cisco. SFP-10G-LR
Finisar. FTLX1471D3BCL
Sumitomo. SPP5101LR-GL
10GBase-LRM SFP+ module
Avago. AFBR-707SDZ
Cisco. SFP-10G-LRM
However there is a NetGear community thread where one user reports having used a MikroTik S+RJ10 (a 10GBase-T SFP+ transceiver).

This is definitely possible, I have experienced third party transceivers working in enterprise level networking devices. With that being said, try it at your own risk, maybe examine return policies or other options before proceeding.
If this MikroTik SFP+ transceiver works in the router, and you connect with a CAT6 or CAT6A, you will be good to go for 10G connectivity between the router and your device.