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An alternate configuration of a load register using 2x1 MUXES to control the loading of the register, but with Q feeding into the "1" control side of the next MUX in the sequence, and the last Q will then give out the value of the parallel inputs in serial.
LED's at the top show the Q values at their present state, the LED on the bottom shows the serial output of the register.
Bottom-Left most logic input is LOAD, to its right is CLK, the 4 logic inputs going into the 1st AND in the MUXES are the parallel inputs, D0 D1 D2 and D3, and the top most logic input is "serial in".
The values of the register will be show by the top 7-segment display, and another register will store the serial output and drive another 7-segment display to show the output
(Yes this is technically parallel to serial to parallel, but its made to demonstrate how the load-shift register works)
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