Depends on the size of what you got. I have a Cobra 75 and I used a spot on the dash that had nothing in it and made a custom mount that looked OEM. Plugged right in and when not plugged in, looked like an OEM plug. Now I have my plug in my center Tuffy console. Looks like you got a RS CB, probably a decent sized unit...I've always thought under the seat might be a good place if you got room...outta site, you don't change channels that much, or I don't and keeps it safe. Now if you like to go swimming, then you might have a problem...
Do a search, there are tons of threads on CB installations.
