EV 14-50 plug charge from TT-30 125V power adapter cord.
RV 30 AMP NEMA TT-30 125V 3-prong male plug.
Electrical Vehicle 4-prong 14-50 female connector, lighted with handle.
STW 10AWG/3C stranded conductor inner wire, support max 30 AMP loading.
Heavy-duty 100% copper wire conductor inside, Length : 1.5 FT

 
 Please setting your EV charging less than 30 AMP
If you want to use your Tesla UMC charger with 14-50 adapter plug into TT-30 camper outlet. 
This adapter cord can help you to do it.
Please make sure to turn down your amperage to 24 amps when charging.