What cable/socket did you specify for the Rolec?
Model 3 is Type 2 for AC or CCS for DC.
The other end is dependent on what you specified on Rolec, but Tesla supply a (currently) 4m long type 2 to type 2 (both ends still use different plugs) cable, so you really want a type 2 untethered outlet (which looks to be the standard Rolec socket type) or a tethered type 2 and keep the Tesla cable dry in the boot.
Most people would suggest tethered is more convenient but slightly less flexible in what other cars it can connect to. Model 3 is approx 4.9m long if that helps as a constraint when choosing required cable length.