Back for his second spell in Hampshire, Connor initially joined Farnborough from Chertsey Town at the start of the 2018/19 season.
Cullen found the net 10 times during his first season with The Yellows and improved his total the following season with 13 goals back in the 2019/20 campaign.
The Chertsey born striker started his playing career with Brentford, before switching to Staines Town, Sandgate and then Uxbridge.