Just bought one of these. Instructions are awful for new user.
There are other videos with more depth.
Get a jumper or two. Keep meter, FS antenna & jumpers + instructions in a container of some sort. Include some connectors also. Make these dedicated to the meter.
I use a zippered bag bought at Home Depot or Lowe’s from tool department.
— DVM, clamp ammeter, etc, and some dedicated hand tools + supply in a larger zip-top tool bag. (Small stuff in ziplocks).
This Gladstone-style bag is accessory to my main tool bag used on the road.
Radio + Speaker & Misc into a Harbor Freight 2800 or 3800 Apache transport case. It is along wherever radio is mounted (same as radio tool/supply bag).
Attend this end of things earliest. Damage is mighty frustrating, and avoidable given it occurs most often moving radio to/from vehicle. (Same for all other gear).
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