Considering he’s 39 and hasn’t played in 4 years it’s either more rubbish or as you say he's a coach. Though I’m not sure how he’d get a work permit.
I’d seriously doubt he’s coming in as a player given his age and that he hasn’t had a club for years. I’d also doubt he’d be brought in as goalkeeping coach, he finished off playing in the Ghanaian third division. There are other Yeboah’s we might be linked with maybe?