can i use these for connecting two 10 mm led strips to gether
Yes you can.
want to go 90 degrees with single colour led strip[do not want to bend strip] by can't find component to facilitate.
Please see below our suitable components:
Each strip has to be linked with a connector to two core cables. We advise installing the cable into the clear connector on one side and cable on the other side then cripm down with pliers.