Unfortunately I do not have that model or similar for testing

I just linked and read the manual. Wait for response from some user that has this model of device

For maps on SD, try to put different mapset and see if they work: gmapprom.img ,gmapprom1.img, gmapsupp.img, , gmapsup1.img, gmapsup2.img,Pippo.img,etc...

I not expert,sorry.....simply user like you

Bye,bye