Negotiation on the final details of a cease-fire in the Rhodesian civil war remained stalled today at the peace talks here, as Patriotic Front guerrilla leader Robert Mugabe complained about the "refusal by Britain to afford equal treatment to both sides."

He characterized the British plan for the positioning of the opposing forces during a cease-fire in Rhodesia as "quite deficient."

Mugabe objected that the guerrillas would be rounded up in 14 remote assembly places, while the forces of the former biracial Salisbury government would be located at three times as many bases in strategic locations. British officials have pointed out that Salisbury's forces are 3 times as large as the guerrillas.

"We must not be disadvantaged in the position of our troops," said Mugabe, who promised a counter-proposal from the Patriotic Front tomorrow.

British sources, who say the real bargaining is now going on behind the scenes here, still hope final agreement can be reached and the cease-fire document signed later this week.

Meanwhile, British officials are trying to calm growing concern here that the British governor in Rhodesia, Lord Soames, the British officials asisting him and the 700 British troops of the British. Commonwealth cease-fire monitoring force, could become trapped in a continuing conflict.

Foreign Office Minister Sir Ian Gilmour told the House of Commons that the British officals and troops would be in Rhodesia only for a matter of weeks" until a new election was held in Rhodesia and legal independence granted.