If you can't set it up with iCloud and "Find My Mac", you can insert what called a Tile to track it:
https://www.thetileapp.com/store/tiles/mate?defaultproduct=mate-1-pack&opt=&utm_campaign=pn_g_tb-acq_mid_sall_shopping-nb-beta_alsc_nat-usa_broad&utm_source=google&utm_medium=cpc&utm_content=213401926938&utm_term=-&adgroup=58700002728313304&tactic=&gclid=EAIaIQobChMIhYq9_vvU1gIVlLrACh1JIAD4EAkYASABEgIauPD_BwE&gclsrc=aw.ds&dclid=CN6Uzob81NYCFVk5Twod4G0JTQ