Norco electric bed slideout

I have a 2014 Big Horn 3570RS with a Norco electric bed slide. The motor or gear box is making an awful noise and I have to help it in and out. I looked under the mattress plywood for an opening to get to the units but see a metal box there with no access. Anybody know how to get to them??

Thanks for any help for this TN Hillbilly
 
The under bed storage compartment on our 2014 3010 has a false bottom. If you pull
a couple screws it should lift out and expose the motor.
 
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