For PIC16F88 there are 2 Config words shown in mikroC PRO PIC Compiler but Proteus PIC16F88 model has only 1 field for Config word. How to enter config word for PIC16F88 in Proteus ?
You don't need to enter this configuration word. It should be done by Proteus or the compiler you are using. If you have 2 configuration words, that may mean that you have 2 options, but you can set only 1. What settings do each of the configuration words set? Check the datasheet for how many configuration words can be used at 1 time.
You can try by adding 2 bytes "0xByte1 0xByte2".