Modify global variable array through a bash function, passing the function the name of the variable as a string

Dear I need something to help me in this. I'm trying to modify a global array through a function , using an auxiliary variable called "array". I would like to modify the global array "config " using a function that takes a string with the name of the variable " config".

I'm trying the following but I have not gotten results .

declare -A config

function testABC {
    array=${1}[@]
    array["key"]="value1"
    array["key2"]="value2"
}

testABC "config"
echo ${config["key"]}
echo ${config["key2"]}

#desired output:
#value1
#value2

My version of bash is 4.2.45

regards.