Dob servocat / nexus

[stuy]

Hi all just received a 18” dob with  servocat and nexus ( multi functional?) 

but  I’ve a handset with the servocat but can any recommend a handset for the  nexus I think the previous owner used a iPad ?  I can’t get the the back of the nexus unit to get the number for Wi-Fi application as it’s glued solid to the rocker box!  Can I plug in a nexus handset into the servocat ?  Instead of a laptop or iPad ?  Thanks all stu