I can provide more specific for the original model or keypad programming codes for the PRO version if you can confirm which one is on your desk. Old HF Marine radio for Ham Radio: IC-M700 : r/HamRadio
For detailed schematics and step-by-step instructions, these repositories and sites are frequently cited by the community: icom m700 mods
Let’s break down the top three modifications that will change your M700 experience. I can provide more specific for the original