R series by terminal A in a potentiometer
I got the answer, first circuit picture is correct when RWB is 0Ohms and RWA = 5Kohms, this happens when the position has reached the maximum distance. But when distance is minimum, the RWA = 0Ohms. This means the second circuit is wrong. W will be connected to ground. So R1 will have no effect. Rpot must be divided (or separated) into 2 resistences with complementary values: RWA + RWB = Rpot.
How I found it is through finding the correct equivalent circuit and calculating Vout. After this I did some position tests and the both values, experimental and theoretical matches. 



Req = R9 + RBW + (RWA||R26) = Req1 + Req2

Req1 = R9 + RBW

Req2 = RWA||R26

So Vout = Vin·[Req2/(Req2 + Req1)]

When RWA = 0Ohm --> Vout = 0V.

When RWB = 0Ohms --> Vout = Vin · 4975/(4975+1000) = 9.99V