AXIOMTEK tBOX520-ADL-MR Series User Manual page 19

Step 2 Insert the SIM Card into the socket and push in. Then put back the
cover and tighten the screw.
Step 3 Install the wireless module into the slot and tighten the screws.
Hardware Installation
SIM slot Wireless module insert slot
S1(up) CN8
S2(down) CN10
tBOX520-ADL-MR Series User's Manual
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