Hi all

I've got a xr3i spec 90 and just bought an 87 rs turbo.when i moved the windscreen water tank and pump i notice some changes: both have a 2wire in 1 plug but my xr3i has only a front wire tank/connection and these send the water to front windscreen and rear.the rs has 2 wire plugs in the front and rear also.can i fit the same water tank and wire connection from the xr3i on the rs or the extra rear plug that i have found on the rs must have another tank/pump somewere?
Is the electrical command/scheme the same in both cars or there are changes between them?if they are diferent how can i use my xr3i on the rs one?

Thanks for help