Blues Brothers - Sweet Home Chicago Chords & Tabs

Sweet Home Chicago intro...
Please don't copyy it without my permission.

e-5/7-7-7--5/7-7-7--6----------|
B-7/9---9--7/9---9--7----------|
G------------------------------|
D------------------------------|
A------------------------------|
E------------------------------|
[ Tab from: https://www.guitartabs.cc/tabs/b/blues_brothers/sweet_home_chicago_tab_ver_3.html ]
e-5/7-7-7--5/7-7-7--6--4-------|
B-7/9---9--7/9---9--7--5---6---|
G------------------------------|
D------------------------------|
A------------------------------|
E------------------------------|

e------0--------0---------0----|
B-2/3----3---2-----2---1-----1-|
G-3/4----4---3-----3---2-----2-|
D------------------------------|
A------------------------------|
E------------------------------|

e-------0-----OR---------------|
B------------------------------|
G-0--1-------------------------|
D------------------------------|
A-------------------0--1--2----|
E------------------------------|

Please leave feedback. I'm almost positive it's in a. 
Thanks,
Joe Carroll