Sorry there is no USB Cam importer on grogbuild, you need to put your line in manually, if its oscam.server file it goes into /usr/keys/oscam_atv_emu folder otherwise it goes into /usr/keys folder, you can either use filezilla to upload to the box or open file explorer on your computer and click on the Network link on the left, you should then see your box listed double click on it and then Root, now browse to the folder that you want to put the file into.